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Tran TMD, Aonbangkhen C, Duong TH, Nguyen THM, Ho MTT, Chavasiri W, Wongsuwan S, Chatwichien J, Giao Vo TP, Nguyen NH, Kiriwan D, Choowongkomon K. Diphenyl ethers from the cultured lichen mycobiont of Graphis handelii Zahlbr. Heliyon 2024; 10:e25763. [PMID: 38404884 PMCID: PMC10884431 DOI: 10.1016/j.heliyon.2024.e25763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 02/01/2024] [Accepted: 02/01/2024] [Indexed: 02/27/2024] Open
Abstract
Purpose Cultured lichen mycobionts are valuable sources of new natural compounds. Mycobiont of Graphis handelii growing in Vietnam was isolated, cultivated and chemically investigated. The crude extract of this cultured mycobiont showed potent alpha-glucosidase inhibition with an IC50 value of 50 μg/mL. Methods Multiple chromatographic methods were applied to the extract to isolate compounds. The combination of Nuclear Magnetic Resonance analysis and high-resolution mass spectroscopy determined their chemical structures. Electrophilic bromination/chlorination was applied to obtain new derivatives using NaBr/H2O2 and NaCl/H2O2 reagents. Compounds were evaluated for enzyme inhibitory activities, including alpha-glucosidase inhibition, HIV-1 reverse transcriptase inhibition, SARS-CoV-2 main protease (Mpro) inhibition, anti-inflammatory activity, and cytotoxicity against several cancer cell lines. A molecular docking study for anti-SARS-CoV-2 was conducted to understand the inhibitory mechanism. Results A new diphenyl ether, handelone (1) and a known compound xylarinic acid A (2) were isolated and elucidated. Four synthetic products 6'-bromohandelone (1a), 2'-bromohandelone (1b), 2',6'-dibromohandelone (1c), and 2',6'-dichlorohandelone (1d) were prepared. Compound 1 showed good activity against Mpro with an IC50 value of 5.2 μM but it showed weak or inactive activity in other tests. Other compounds were inactive in all assays. Conclusion A new compound, handelone (1) was isolated from the cultured mycobiont of Graphis handelii. From these compounds, four new derivatives were prepared. Compound 1 showed good activity against Mpro with an IC50 value of 5.2 μM but it showed weak or inactive activity in other tests. Other compounds were inactive in all assays.
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Affiliation(s)
- Thi-Minh-Dinh Tran
- Department of Biology, Ho Chi Minh City University of Education, 280 an Duong Vuong Street, District 5, Ho Chi Minh City, 748342, Viet Nam
- KU Institute for Advanced Studies, Kasetsart University, Bangkok, 10900, Thailand
| | - Chanat Aonbangkhen
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, 280 an Duong Vuong Street, District 5, Ho Chi Minh City, 748342, Viet Nam
| | - Thu-Hoang-Mai Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, 280 an Duong Vuong Street, District 5, Ho Chi Minh City, 748342, Viet Nam
| | - Minh-Truong-Tho Ho
- Department of Chemistry, Ho Chi Minh City University of Education, 280 an Duong Vuong Street, District 5, Ho Chi Minh City, 748342, Viet Nam
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand
- Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Sutthida Wongsuwan
- Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Bangkok, 10210, Thailand
| | - Jaruwan Chatwichien
- Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Bangkok, 10210, Thailand
| | - Thi-Phi Giao Vo
- University of Science, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam
| | - Ngoc-Hong Nguyen
- CirTech Institute, HUTECH University, 475 A Dien Bien Phu Street, Binh Thanh District, Ho Chi Minh City, Viet Nam
| | | | - Kiattawee Choowongkomon
- KU Institute for Advanced Studies, Kasetsart University, Bangkok, 10900, Thailand
- Department of Biochemistry, Kasetsart University, Bangkok, Thailand
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Nguyen TQT, Pham NKT, Trung NT, An NT, Mai DT, Sichaem J, Huynh BLC, Anh NTH, Nguyen NH, Duong TH. Indicuen, a new hopane from Parmotrema indicum Hale growing in Vietnam. Nat Prod Res 2023; 37:1284-1291. [PMID: 34758682 DOI: 10.1080/14786419.2021.2003355] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
One new hopane-type triterpene, indicuen (1), along with eight known compounds (2-9) were isolated from the n-hexane extract of the lichen Parmotrema indicum Hale. The chemical structures of isolated compounds were identified by interpretation of their spectroscopic data (1D, 2D NMR and HRESIMS) combined with DFT-NMR chemical shift calculations and subsequent assignment of DP4+ probabilities and by comparison with the literature. Indicuen represents for a rare hopane bearing a 1-carboxyethyl substituent at C-21 in lichens. Compounds 1-3 and 5-8 were evaluated for α-glucosidase inhibition and cytotoxicity against K562 and HepG2 cancer cell lines. Compounds 1, 5 and 7 exhibited moderate α-glucosidase inhibition with IC50 values of 201.1, 156.3 and 187.4 µM, respectively. Compound 1 also showed weak cytotoxicity toward K562 cell line while others showed no activity.
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Affiliation(s)
| | | | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Quy Nhon, Vietnam
| | - Nguyen Truong An
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Quy Nhon, Vietnam
| | - Dinh-Tri Mai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi, Vietnam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
| | | | - Nguyen Thi Hong Anh
- Ho Chi Minh City University of Food Industry, 140 Le Trong Tan Street, Tay Thanh Ward, Tan Phu District, HCMC, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
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3
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Do TH, Duong TH, Nguyen Minh An T, Vo TPG, Do VM, Nguyen NH, Sichaem J. Two New α-Glucosidase Inhibitory Depsidones from the Lichen Parmotrema cristiferum (Taylor) Hale. Chem Biodivers 2023; 20:e202201213. [PMID: 36775801 DOI: 10.1002/cbdv.202201213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/17/2023] [Accepted: 02/10/2023] [Indexed: 02/14/2023]
Abstract
A bioactivity-guided investigation of the lichen Parmotrema cristiferum (Taylor) Hale (Parmeliaceae) led to the isolation of two new depsidones, cristifones A and B (1 and 2). The structures of the isolated compounds were identified by spectroscopic methods and comparison with the literature data. Compound 1 showed the initial combined structures of depsidone and depside cores. The two isolated compounds were then evaluated for α-glucosidase inhibition. Compounds 1 and 2 were confirmed as potent, with IC50 values of 21.5 and 18.4 μM, respectively. Compound 2 was a non-competitive inhibitor against α-glucosidase, as indicated by the intersect in the second quadrant of each respective plot.
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Affiliation(s)
- Thanh-Hung Do
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, 754000, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City, 700000, Vietnam
| | - Tran Nguyen Minh An
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City, 727000, Vietnam
| | - Thi-Phi-Giao Vo
- Faculty of Biology, University of Science, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
| | - Van-Mai Do
- Nam Can Tho University, Nam Can Tho University, , Can Tho City, 900000, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, HUTECH University, 475 A Dien Bien Phu Street, Binh Thanh District, Ho Chi Minh City, 717000, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, 52190, Thailand
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Bitchagno GTM, Nchiozem-Ngnitedem VA, Melchert D, Fobofou SA. Demystifying racemic natural products in the homochiral world. Nat Rev Chem 2022; 6:806-822. [PMID: 37118098 PMCID: PMC9562063 DOI: 10.1038/s41570-022-00431-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/13/2022] [Indexed: 12/03/2022]
Abstract
Natural products possess structural complexity, diversity and chirality with attractive functions and biological activities that have significantly impacted drug discovery initiatives. Chiral natural products are abundant in nature but rarely occur as racemates. The occurrence of natural products as racemates is very intriguing from a biosynthetic point of view; as enzymes are chiral molecules, enzymatic reactions generating natural products should be stereospecific and lead to single-enantiomer products. Despite several reports in the literature describing racemic mixtures of stereoisomers isolated from natural sources, there has not been a comprehensive review of these intriguing racemic natural products. The discovery of many more natural racemates and their potential enzymatic sources in recent years allows us to describe the distribution and chemical diversity of this ‘class of natural products’ to enrich discussions on biosynthesis. In this Review, we describe the chemical classes, occurrence and distribution of pairs of enantiomers in nature and provide insights about recent advances in analytical methods used for their characterization. Special emphasis is on the biosynthesis, including plausible enzymatic and non-enzymatic formation of natural racemates, and their pharmacological significance. ![]()
Racemic natural products display a wealth of bioactivities and chemical diversity. Their derivation from intriguing racemization processes, through enzymatic or non-enzymatic pathways, are discussed here, as well as their pharmacological properties and the analytical techniques developed for their identification, resolution and characterization.
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Huynh BLC, Nguyen TTL, Nguyen VK, Chavasiri W, Nguyen KPP, Duong TH. Three new phenolic compounds from the lichen Ramalina peruviana Ach. (Ramalinaceae). Nat Prod Res 2022; 36:2009-2014. [DOI: 10.1080/14786419.2020.1839463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | - Thi-Thuy-Linh Nguyen
- Department of Chemistry, University of Science, National University HCM City, Ho Chi Minh City, Vietnam
| | - Van-Kieu Nguyen
- Future Materials & Devices Laboratory, Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang City, Vietnam
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Kim-Phi-Phung Nguyen
- Department of Chemistry, University of Science, National University HCM City, Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
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Tri MD, Phat NT, Trung NT, Phan CTD, Minh PN, Chi MT, Nguyen TP, Dang CH, Hong Truong L, Pham NKT, Mai TTN, Duong TH. A new 26-norlanostane from Phlogacanthus turgidus growing in Vietnam. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2022; 24:196-202. [PMID: 33876656 DOI: 10.1080/10286020.2021.1913125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 03/30/2021] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Abstract
Chemical investigation on chloroform extract of Phlogacanthus turgidus led to the isolation of one new compound namely turgidol, together with five known triterpenoids, lupeol, lupenone, betulin, betulinic acid, and taraxerol. Their structures and stereochemistry have been determined by 1 D and 2 D NMR analysis, high resolution mass spectrometry, and compared with those in literatures. The relative configuration of turgidol was defined using DFT-NMR chemical shift calculations and subsequent DP4+ probability method. Turgidol, betulin, and betulinic acid were evaluated for cytotoxic activity toward K562 cancer cell line and the alpha-glucosidase inhibition.
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Affiliation(s)
- Mai Dinh Tri
- Vietnam Academy of Science and Technology, Graduate University of Science and Technology, Ha noi 11355, Vietnam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City 71515, Vietnam
| | - Nguyen Tan Phat
- Vietnam Academy of Science and Technology, Graduate University of Science and Technology, Ha noi 11355, Vietnam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City 71515, Vietnam
| | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Quy Nhon 55100, Vietnam
| | - Cam-Tu D Phan
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Quy Nhon 55100, Vietnam
| | - Phan Nhat Minh
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City 71515, Vietnam
| | - Mai Thanh Chi
- Vietnam Academy of Science and Technology, Graduate University of Science and Technology, Ha noi 11355, Vietnam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City 71515, Vietnam
| | - Thi-Phuong Nguyen
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 72806, Vietnam
| | - Chi Hien Dang
- Vietnam Academy of Science and Technology, Graduate University of Science and Technology, Ha noi 11355, Vietnam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City 71515, Vietnam
| | - Luu Hong Truong
- Southern Institute of Ecology, Vietnam Academy of Science and Technology, Ho Chi Minh City 71515, Vietnam
| | - Nguyen Kim Tuyen Pham
- Faculty of Environmental Science, Sai Gon University, Ho Chi Minh City 72711, Vietnam
| | - Trần Thị Ngọc Mai
- Ho Chi Minh city University of Technology (HUTECH), Ho Chi Minh city 72324, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City 72711, Vietnam
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Srinivasan M, Shanmugam K, Neelakantan HG. Natural Product Investigation in Lichens: Extraction and HPLC Analysis of Secondary Compounds in Mycobiont Cultures. Methods Mol Biol 2022; 2489:459-468. [PMID: 35524065 DOI: 10.1007/978-1-0716-2273-5_24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Chromatography techniques facilitate separation, purification, and identification of secondary compounds (natural products) in lichens and their mycobiont cultures. In particular, high-performance liquid chromatography (HPLC) plays a vital role in the identification of lichen substances because of its high sensitivity, speed, and reliability with the minimal sample. Therefore, we describe the extraction and HPLC protocol for the investigation of secondary compounds with a special focus on lichen mycobiont cultures.
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Affiliation(s)
- Muthukumar Srinivasan
- Lichen Ecology and Bioprospecting Laboratory, Biotechnology Programme, M.S. Swaminathan Research Foundation, Chennai, India
| | - Karthik Shanmugam
- Lichen Ecology and Bioprospecting Laboratory, Biotechnology Programme, M.S. Swaminathan Research Foundation, Chennai, India
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8
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Nguyen THT, Do THT, Tien Trung N, Nguyen TP, Phan DCT, Vo VG, Nguyen NH, Duong TH. Further terpenoids from Vitex negundo L. growing in Vietnam. JOURNAL OF SAUDI CHEMICAL SOCIETY 2021. [DOI: 10.1016/j.jscs.2021.101298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Chemical Constituents of the Hexane Fraction of the Lichen Parmotrema dilatatum and their α-Glucosidase Inhibition Activity. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03404-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Tran CL, Tri MD, Tien-Trung N, Phan NM, Phan CTD, Tran TN, Do TH, Tran NMA, Tran TNM, Duong TH. Nervione, a new benzofuran derivative from Nervilia concolor. Nat Prod Res 2021; 36:5148-5154. [PMID: 33970720 DOI: 10.1080/14786419.2021.1920585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A new benzofuran derivative, nervione (1), was isolated from Nervilia concolor (Blume) Schltr. (Orchidaceae). Eight previously reported compounds were also isolated: 5,7-dimethoxyflavone (2), 3,5,7-trimethoxyflavone (3), 7-methoxyflavone (4), 3,7-dimethoxy-5-hydroxyflavone (5), tetramethylscutellarein (4',5,6,7-tetramethoxyflavone) (6), 5,7-dimethoxy-4'-hydroxyflavone (7), rhamnetin (8), and 5,7-dihydroxy-3',4'-dimethoxyflavone (9). The structures were elucidated by 1D, 2D NMR, and HRESIMS spectroscopy in addition to the literature. The relative configuration of 1 was defined using DP4+ probability while its absolute configuration was defined by comparison of the ECD spectrum of 1 with those of previously reported compounds. All isolated compounds were evaluated for alpha-glucosidase inhibition, revealing weak or no activity.
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Affiliation(s)
- Cong-Luan Tran
- Faculty of Pharmacy and Nursery, Tay Do University, Can Tho, Vietnam
| | - Mai Dinh Tri
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Cau Giay, Ha noi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Nguyen Tien-Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Vietnam
| | - Nhat-Minh Phan
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Cau Giay, Ha noi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Cam-Tu D Phan
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Vietnam
| | - Thanh-Nha Tran
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Thanh-Hung Do
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | - Nguyen-Minh-An Tran
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thi-Ngoc-Mai Tran
- Institute of Applied Sciences, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
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11
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Do TH, Nguyen TT, Dao TBN, Vo HC, Huynh BLC, Nguyen TAT, Mai DT, Vo TPG, Sichaem J, Nguyen NH, Duong TH. A new diphenyl ether from Parmotrema indicum Hale growing in Vietnam. Nat Prod Res 2021; 36:4879-4885. [PMID: 33823690 DOI: 10.1080/14786419.2021.1907748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Chemical investigation of the lichen Parmotrema indicum Hale led to the isolation of one new diphenyl ether, parmetherine D (1), along with eight known compounds (2-9). The structures were determined by analysis of MS and NMR data and by comparison with the literature. Compounds 1, 2, and 7 were evaluated for α-glucosidase inhibition. Only compound 1 exhibited significant inhibition.
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Affiliation(s)
- Thanh-Hung Do
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | - Thanh-Trung Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang, Vietnam.,Faculty of Pharmacy, Duy Tan University, Da Nang, Vietnam
| | - Thi-Bich-Ngoc Dao
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Huu-Canh Vo
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | | | | | - Dinh-Tri Mai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Thi-Phi-Giao Vo
- Faculty of Biology, Ho Chi Minh University of Science, National University, Ho Chi Minh City, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
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12
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Pham NKT, Nguyen HT, Dao TBN, Vu-Huynh KL, Nguyen TQT, Huynh BLC, Le TD, Nguyen NH, Nguyen NH, Duong TH. Two new phenolic compounds from the lichen Parmotrema cristiferum growing in Vietnam. Nat Prod Res 2021; 36:3865-3871. [PMID: 33656403 DOI: 10.1080/14786419.2021.1892672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Two new phenolic compounds, cristiferides A-B (1-2) together with six known compounds, 2,4-dihydroxyphthalide (3), lecanoric acid (4), orsellinic acid (5), 5-chloroorsellinic acid (6), methyl haematommate (7), and methyl β-orsellinate (8) were isolated from the lichen Parmotrema cristiferum (Taylor) Hale (Parmeliaceae). The structures of isolated compounds were identified from its spectroscopic data and by comparison with the literatures. Compounds 1-3 and 6-8 were evaluated for alpha-glucosidase inhibition. Compounds 2 and 7 revealed potent activity with IC50 values of 72.66 μM and 48.73 μM, respectively.
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Affiliation(s)
| | - Huy Truong Nguyen
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Thi-Bich-Ngoc Dao
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Kim Long Vu-Huynh
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | | | | | - Tien-Dung Le
- Vietnam Academy of Science and Technology, Graduate University of Science and Technology, Ha Noi, Vietnam.,Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Ngoc-Hung Nguyen
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
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13
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Duong TH, Nguyen VK, Sichaem J, Tran TN, Do TH, Pham NKT, Nguyen TAT, Nguyen THT, Mai DT, Nguyen NH, Huynh BLC. Reticulatin, a novel C 43-spiroterpenoid from the lichen Parmotrema reticulatum growing in Vietnam. Nat Prod Res 2021; 36:3705-3712. [PMID: 33576270 DOI: 10.1080/14786419.2021.1885032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A novel C43-spiroterpenoid, reticulatin (1), was isolated from the lichen Parmotrema reticulatum (Taylor) M. Choisy (Parmeliaceae). Five previously-reported compounds were also isolated: zeorin (2), leucotylin (3), lupeol (4), betulinic acid (5), and dihydroreynosin (6). The structures were elucidated by 1D, 2D NMR, and HRESIMS spectroscopy and comparison with the literature. We propose that reticulatin is a biosynthetic product of fusicoccadiene and vinapraesorediosic acid A via Diels-Alder addition. Reticulatin is the first C43-spiroterpenoid identified from lichen metabolites. All compounds were evaluated for inhibition of α-glucosidase. Compound 1 showed the most potent inhibition, with an IC50 value of 3.90 μM, much lower than that of the acarbose positive control (IC50 165 µM).
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Affiliation(s)
- Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Van-Kieu Nguyen
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam.,Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
| | - Thanh-Nha Tran
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Thanh-Hung Do
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | | | - Thi-Anh-Tuyet Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Thi-Hoai-Thu Nguyen
- Faculty of Basic Sciences, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Dinh-Tri Mai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
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14
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Bui VM, Duong TH, Nguyen TAM, Nguyen TNV, Nguyen NH, Nguyen HH, Chavasiri W, Nguyen KPP, Huynh BLC. Two new phenolic compounds from the Vietnamese lichen Parmotrema tinctorum. Nat Prod Res 2020; 36:3429-3434. [PMID: 33356561 DOI: 10.1080/14786419.2020.1864367] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Chemical investigation of the lichen Parmotrema tinctorum (Nyl.) Hale led to the isolation of two new phenolic compounds, 2-ethylhexyl orsellinate (1) and tinctorinone (2). The structures were determined by analysis of their MS and NMR data as well as by comparison with literature data. The 2-ethylhexyl ester group of 2-ethylhexyl orsellinate is uncommon among lichen metabolites. Tinctorinone revealed strong inhibition towards α-glucosidase.
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Affiliation(s)
- Van-Muoi Bui
- Department of Organic Chemistry, University of Science, National University - Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | | | - Thi-Ngoc-Van Nguyen
- Department of Organic Chemistry, University of Science, National University - Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Huu-Hung Nguyen
- Faculty of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Kim-Phi-Phung Nguyen
- Department of Organic Chemistry, University of Science, National University - Ho Chi Minh City, Ho Chi Minh City, Vietnam
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15
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Thai CT, Duong TH, Trung NT, Phan CTD, Nguyen QV, Nguyen TLT, Watanabe K, Do TTH, Huynh TN, Tran H. Rukamtenol, a new spiro compound isolated from Flacourtia rukam Zoll. & Moritzi growing in Vietnam. Nat Prod Res 2020; 36:1966-1972. [PMID: 33258382 DOI: 10.1080/14786419.2020.1839451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Chemical investigation of chloroform extract of Flacourtia rukam Zoll. & Moritzi stems led to the isolation of one new compound namely rukamtenol together with four known compounds, viz., chaulmooric acid, flacourtin, 3,4,5-trimethoxyphenyl β-D-glucopyranoside, and daucosterol. Their structures and relative stereochemistry have been determined by 1D and 2D NMR analysis, high resolution mass spectroscopy, and compared with those in literatures. Rukamtenol represented the first 2-oxaspiro[4.4]non-8-en-3-one in nature. The relative configuration of rukamtinol was defined using DFT-NMR chemical shift calculations and subsequent DP4 probability method. Rukamtenol, flacourtin, and 3,4,5-trimethoxyphenyl β-D-glucopyranoside were tested for cytotoxic activity toward three MDA-MB-231, HepG2, and RD cancer cell lines. However, they failed to reveal any activity (IC50 > 100 μM) on these cell lines.
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Affiliation(s)
- Cam Thi Thai
- Faculty of Pharmacy, Department of Pharmacognosy, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Vietnam
| | - Cam-Tu D Phan
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Vietnam
| | - Quoc Vuong Nguyen
- Faculty of Pharmacy, Department of Pharmacognosy, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Tuyen Le-Thanh Nguyen
- Faculty of Pharmacy, Department of Pharmacognosy, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Kazuki Watanabe
- Faculty of Pharmacy, Laboratory of Natural Medicines, Takasaki University of Health and Welfare, Takasaki, Japan
| | - Tuoi Thi-Hong Do
- Faculty of Pharmacy, Department of Pharmacognosy, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thuy Ngoc Huynh
- Faculty of Pharmacy, Department of Pharmacognosy, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hung Tran
- Faculty of Pharmacy, Department of Pharmacognosy, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
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16
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Nguyen THT, Nguyen TMN, Nguyen TT, Nguyen HH, Nguyen NH, Mai DT, Huynh BLC, Tran CL, Duong TH. Parmosidone K, a new meta-depsidone from the lichen Parmotrema tsavoense. Nat Prod Res 2020; 36:2037-2042. [PMID: 33213224 DOI: 10.1080/14786419.2020.1844697] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Further phytochemical investigation on P. tsavoense led to one new meta-depsidone, parmosidone K together with one known compound, barbatic acid. Their structures were determined by 1D and 2D NMR analysis, high resolution mass spectroscopy, and comparison their NMR data with those reported in literatures. Parmosidone K was evaluated for α-glucosidase inhibition and revealed the powerful activity with IC50 value of 3.12 µM.
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Affiliation(s)
- Thi-Hoai-Thu Nguyen
- Faculty of Basic Sciences, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thi-My-Nhung Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Thanh-Trung Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang, Vietnam.,Faculty of Pharmacy, Duy Tan University, Da Nang, Vietnam
| | - Huu-Hung Nguyen
- Faculty of Biotechnology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Dinh-Tri Mai
- Faculty of Chemistry, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Faculty of Technology, Van Lang University, Nguyen Khac Nhu, Ho Chi Minh City, Vietnam
| | | | - Cong-Luan Tran
- Faculty of Pharmacy and Nursery, Tay Do University, Can Tho, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
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17
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Devi AP, Duong TH, Ferron S, Beniddir MA, Dinh MH, Nguyen VK, Pham NKT, Mac DH, Boustie J, Chavasiri W, Pogam PL. Salazinic Acid-Derived Depsidones and Diphenylethers with α-Glucosidase Inhibitory Activity from the Lichen Parmotrema dilatatum. PLANTA MEDICA 2020; 86:1216-1224. [PMID: 32819010 DOI: 10.1055/a-1203-0623] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Three new depsidones, parmosidones F - G (1 - 2), and 8'-O-methylsalazinic acid (3), and 3 new diphenylethers, parmetherines A - C (4 - 6), together with 2 known congeners were isolated from the whole thalli of Parmotrema dilatatum, a foliose chlorolichen. Their structures were unambiguously determined by extensive spectroscopic analyses and comparison with literature data. The isolated polyphenolics were assayed for their α-glucosidase inhibitory activities. Newly reported benzylated depsidones 1: and 2: in particular inhibited α-glucosidase with IC50 values of 2.2 and 4.3 µM, respectively, and are thus more potent than the positive control, acarbose.
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Affiliation(s)
- Asshaima Paramita Devi
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, Thailand
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, Thailand
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Solenn Ferron
- Université Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, Rennes, France
| | - Mehdi A Beniddir
- Équipe «Pharmacognosie-Chimie des Substances Naturelles», BioCIS, Université Paris-Sud, CNRS, Université Paris-Saclay, Châtenay-Malabry, France
| | - Minh-Hiep Dinh
- Management Board of Ho Chi Minh City Agricultural Hi-Tech Park, Binh Thanh, Ho Chi Minh City, Vietnam
| | - Van-Kieu Nguyen
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | | | - Dinh-Hung Mac
- Department of Organic Chemistry, VNU University of Science, Hoan Kiem, Hanoi, Vietnam
| | - Joël Boustie
- Université Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, Rennes, France
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, Thailand
| | - Pierre Le Pogam
- Équipe «Pharmacognosie-Chimie des Substances Naturelles», BioCIS, Université Paris-Sud, CNRS, Université Paris-Saclay, Châtenay-Malabry, France
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18
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Bui VM, Duong TH, Chavasiri W, Nguyen KPP, Huynh BLC. A new depsidone from the lichen Usnea ceratina Arch. Nat Prod Res 2020; 36:2263-2269. [DOI: 10.1080/14786419.2020.1828405] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Van-Muoi Bui
- Department of Organic Chemistry, University of Science, National University – Ho Chi Minh City, Ho Chi Minh City, Viet Nam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Viet Nam
| | - Warinthorn Chavasiri
- Department of Chemistry, Faculty of Science, Center of Excellence in Natural Products Chemistry, Chulalongkorn University, Bangkok, Thailand
| | - Kim-Phi-Phung Nguyen
- Department of Organic Chemistry, University of Science, National University – Ho Chi Minh City, Ho Chi Minh City, Viet Nam
| | - Bui-Linh-Chi Huynh
- Department of Nature, Dong Nai University, Biên Hòa, Dong Nai Province, Vietnam
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19
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Duong TH, Trung NT, Phan CTD, Nguyen VD, Nguyen HC, Dao TBN, Mai DT, Niamnont N, Tran TNM, Sichaem J. A new diterpenoid from the leaves of Phyllanthus acidus. Nat Prod Res 2020; 36:539-545. [DOI: 10.1080/14786419.2020.1789980] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Thuc-Huy Duong
- Faculty of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Qui Nhơn, Vietnam
| | - Cam-Tu Dang Phan
- Laboratory of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Qui Nhơn, Vietnam
| | - Vu-Duy Nguyen
- Faculty of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Hoang-Chuong Nguyen
- University of Science, Vietnam National University, Ho Chi Minh City, Vietnam
| | - Thi-Bich-Ngoc Dao
- Faculty of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Dinh-Tri Mai
- Graduate University of Science and Technology, Viet Nam Academy of Science and Technology, Hanoi, Vietnam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Nakorn Niamnont
- Faculty of Science, Organic Synthesis, Electrochemistry & Natural Product Research Unit, Department of Chemistry, King Mongkut's University of Technology Thonburi, Bangkok, Thailand
| | - Thi-Ngoc-Mai Tran
- Institute of Applied Sciences, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University, Lampang, Thailand
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20
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Phan HVT, Devi AP, Le HD, Nguyen TT, Nguyen HH, Le TTD, Nguyen TH, Sichaem J, Duong TH. Dilatatone, a new chlorinated compound from Parmotrema dilatatum. Nat Prod Res 2020; 35:3608-3612. [DOI: 10.1080/14786419.2020.1716348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | - Asshaima Paramita Devi
- Center of Excellence in Natural Products Chemistry, Department of Chemistry Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, Thailand
| | - Hoang-Duy Le
- Department of Chemistry, Pham Van Dong University, Quang Ngai, Vietnam
| | - Thanh-Trung Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang, Vietnam
| | - Huu-Hung Nguyen
- Faculty of Environment and Biotechnology, Van Lang University, Ho Chi Minh City, Vietnam
| | | | - Tai Hoang Nguyen
- Center of Research and Application Biology, Ho Chi Minh City, Vietnam
| | - Jirapast Sichaem
- Faculty of Science and Technology, Thammasat University, Lampang, Thailand
| | - Thuc-Huy Duong
- Faculty of Chemistry, University of Education, Ho Chi Minh City, Vietnam
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21
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Olivier-Jimenez D, Chollet-Krugler M, Rondeau D, Beniddir MA, Ferron S, Delhaye T, Allard PM, Wolfender JL, Sipman HJM, Lücking R, Boustie J, Le Pogam P. A database of high-resolution MS/MS spectra for lichen metabolites. Sci Data 2019; 6:294. [PMID: 31780665 PMCID: PMC6882832 DOI: 10.1038/s41597-019-0305-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 10/31/2019] [Indexed: 11/15/2022] Open
Abstract
While analytical techniques in natural products research massively shifted to liquid chromatography-mass spectrometry, lichen chemistry remains reliant on limited analytical methods, Thin Layer Chromatography being the gold standard. To meet the modern standards of metabolomics within lichenochemistry, we announce the publication of an open access MS/MS library with 250 metabolites, coined LDB for Lichen DataBase, providing a comprehensive coverage of lichen chemodiversity. These were donated by the Berlin Garden and Botanical Museum from the collection of Siegfried Huneck to be analyzed by LC-MS/MS. Spectra at individual collision energies were submitted to MetaboLights (https://www.ebi.ac.uk/metabolights/MTBLS999) while merged spectra were uploaded to the GNPS platform (CCMSLIB00004751209 to CCMSLIB00004751517). Technical validation was achieved by dereplicating three lichen extracts using a Molecular Networking approach, revealing the detection of eleven unique molecules that would have been missed without LDB implementation to the GNPS. From a chemist's viewpoint, this database should help streamlining the isolation of formerly unreported metabolites. From a taxonomist perspective, the LDB offers a versatile tool for the chemical profiling of newly reported species.
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Affiliation(s)
- Damien Olivier-Jimenez
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, Univ Rennes, F-35000, Rennes, France
- CNRS, IETR (Institut d'Électronique et Télécommunications de Rennes)-UMR 6164, Univ Rennes, F-35000, Rennes, France
| | - Marylène Chollet-Krugler
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, Univ Rennes, F-35000, Rennes, France
| | - David Rondeau
- CNRS, IETR (Institut d'Électronique et Télécommunications de Rennes)-UMR 6164, Univ Rennes, F-35000, Rennes, France
- Département de Chimie, Université de Bretagne Occidentale, F-29238, Brest, France
| | - Mehdi A Beniddir
- CNRS, BioCIS (Biomolécules: Conception Isolement et Synthèse)-UMR 8076, Univ Paris-Sud, Université Paris-Saclay, 5, rue J.-B. Clément, F-92290, Châtenay-Malabry, France
| | - Solenn Ferron
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, Univ Rennes, F-35000, Rennes, France
| | - Thomas Delhaye
- CNRS, IETR (Institut d'Électronique et Télécommunications de Rennes)-UMR 6164, Univ Rennes, F-35000, Rennes, France
| | - Pierre-Marie Allard
- School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne, CMU, 1 Rue Michel Servet, 1211, Geneva 4, Switzerland
| | - Jean-Luc Wolfender
- School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne, CMU, 1 Rue Michel Servet, 1211, Geneva 4, Switzerland
| | - Harrie J M Sipman
- Botanischer Garten und Botanisches Museum, Freie Universität Berlin, Königin-Luise-Strasse 6-8, D-14195, Berlin, Germany
| | - Robert Lücking
- Botanischer Garten und Botanisches Museum, Freie Universität Berlin, Königin-Luise-Strasse 6-8, D-14195, Berlin, Germany
| | - Joël Boustie
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, Univ Rennes, F-35000, Rennes, France.
| | - Pierre Le Pogam
- CNRS, BioCIS (Biomolécules: Conception Isolement et Synthèse)-UMR 8076, Univ Paris-Sud, Université Paris-Saclay, 5, rue J.-B. Clément, F-92290, Châtenay-Malabry, France.
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22
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Duong TH, Beniddir MA, Boustie J, Nguyen KPP, Chavasiri W, Bernadat G, Le Pogam P. DP4-Assisted Structure Elucidation of Isodemethylchodatin, a New Norlichexanthone Derivative Meager in H-Atoms, from the Lichen Parmotrema tsavoense. Molecules 2019; 24:molecules24081527. [PMID: 31003403 PMCID: PMC6515090 DOI: 10.3390/molecules24081527] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/14/2019] [Accepted: 04/15/2019] [Indexed: 11/16/2022] Open
Abstract
A phytochemical investigation of the foliose lichen Parmotrema tsavoense (Krog and Swinscow) Krog and Swinscow (Parmeliaceae) resulted in the isolation of a new trichlorinated xanthone, isodemethylchodatin. The structure elucidation of this new norlichexanthone derivative proved tricky owing to proton deficiency, and to the lack of NMR data of closely related analogues. The structure of this compound was determined based on an integrated interpretation of 13C-NMR chemical shifts, MS spectra, and DP4-based computational chemistry was also performed to provide an independent and unambiguous validation of the determined structure. Isodemethylchodatin represents the first chlorinated lichexanthone/norlichexanthone derivative bearing a methoxy group at C-5.
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Affiliation(s)
- Thuc-Huy Duong
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City 748355, Vietnam.
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 748355, Vietnam.
| | - Mehdi A Beniddir
- Équipe "Pharmacognosie⁻Chimie des Substances Naturelles", BioCIS, Univ. Paris-Sud, CNRS, Université Paris-Saclay, 5 Rue Jean-Baptiste Clément, 92290 Châtenay-Malabry, France.
| | - Joël Boustie
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)⁻UMR 6226, Univ Rennes, F-35000 Rennes, France.
| | - Kim-Phi-Phung Nguyen
- Department of Organic Chemistry, University of Science, National University⁻Ho Chi Minh City, 227 Nguyen Van Cu Str., Dist. 5, Ho Chi Minh City 748355, Vietnam.
| | - Warinthorn Chavasiri
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Rd., Patumwan, Bangkok 10330, Thailand.
| | - Guillaume Bernadat
- Équipe "Pharmacognosie⁻Chimie des Substances Naturelles", BioCIS, Univ. Paris-Sud, CNRS, Université Paris-Saclay, 5 Rue Jean-Baptiste Clément, 92290 Châtenay-Malabry, France.
| | - Pierre Le Pogam
- Équipe "Pharmacognosie⁻Chimie des Substances Naturelles", BioCIS, Univ. Paris-Sud, CNRS, Université Paris-Saclay, 5 Rue Jean-Baptiste Clément, 92290 Châtenay-Malabry, France.
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23
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Hill RA, Sutherland A. Hot off the Press. Nat Prod Rep 2018; 35:1024-1028. [PMID: 30209473 DOI: 10.1039/c8np90032a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A personal selection of 32 recent papers is presented covering various aspects of current developments in bioorganic chemistry and novel natural products such as huperphlegmine A from Huperzia phlegmaria.
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Affiliation(s)
- Robert A Hill
- School of Chemistry, Glasgow University, Glasgow, G12 8QQ, UK.
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