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A Novel Biaryl Derivative from Hydrangea chinensis. Chem Nat Compd 2022. [DOI: 10.1007/s10600-022-03807-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Wellmann J, Tränkner C, Dostert N, Schwarze EC, Hillebrand S, Ley JP, Winterhalter P. Comprehensive Metabolite Profiling of Hydrangea macrophylla ssp. serrata Extracts Using Liquid Chromatography Coupled with Electrospray Ionization Ion Mobility Quadrupole Time-of-Flight Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:11823-11831. [PMID: 36089735 DOI: 10.1021/acs.jafc.2c04351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A wide range of secondary metabolites has been described for various Hydrangea species, including the sweet-tasting phenyldihydroisocoumarin phyllodulcin, which is found in the leaves of Hydrangea macrophylla ssp. serrata. This work aims at the development and validation of an analytical workflow for comprehensive semi-polar metabolite profiling using liquid chromatography coupled with electrospray ionization ion mobility quadrupole time-of-flight mass spectrometry (UPLC-ESI-IMS-QToF-MS) to complement existing analytical studies. The unsupervised analysis of this data set demonstrates the capability of this analytical workflow to distinguish different H. macrophylla ssp. serrata cultivars. In combination with supervised analysis, a list of metabolites responsible for the differentiation of the cultivars studied has been obtained. Suspect screening of phenyldihydroisocoumarins provides comprehensive information, which could help in the search for key enzymes related to the biosynthesis of phyllodulcin.
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Affiliation(s)
- Johannes Wellmann
- Technische Universität Braunschweig, Institute of Food Chemistry, Schleinitzstraße 20, 38106 Braunschweig, Germany
| | - Conny Tränkner
- University of Applied Sciences Erfurt, Erfurt Research Centre for Horticultural Crops, Kühnhäuser Straße 101, 99090 Erfurt, Germany
| | | | | | | | - Jakob P Ley
- Symrise AG, Mühlenfeldstraße 1, 37603 Holzminden, Germany
| | - Peter Winterhalter
- Technische Universität Braunschweig, Institute of Food Chemistry, Schleinitzstraße 20, 38106 Braunschweig, Germany
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Separation of Dihydro-Isocoumarins and Dihydro-Stilbenoids from Hydrangea macrophylla ssp. serrata by Use of Counter-Current Chromatography. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27113424. [PMID: 35684362 PMCID: PMC9182509 DOI: 10.3390/molecules27113424] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 11/16/2022]
Abstract
Previously, different Hydrangea macrophylla ssp. serrata cultivars were investigated by untargeted LC-MS analysis. From this, a list of tentatively identified and unknown compounds that differ significantly between these cultivars was obtained. Due to the lack of reference compounds, especially for dihydro-isocoumarins, we aimed to isolate and structurally characterise these compounds from the cultivar 'Yae-no-amacha' using NMR and LC-MS methods. For purification and isolation, counter-current chromatography was used in combination with reversed-phase preparative HPLC as an orthogonal and enhanced purification workflow. Thirteen dihydro-isocoumarins in combination with other metabolites could be isolated and structurally identified. Particularly interesting was the clarification of dihydrostilbenoid glycosides, which were described for the first time in H. macrophylla ssp. serrata. These results will help us in further studies on the biological interpretation of our data.
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Juang SH, Hsieh MT, Hsu PL, Chen JL, Liu HK, Liang FP, Kuo SC, Chiu CY, Liu SH, Chou CH, Wu TS, Hung HY. Studies of Coumarin Derivatives for Constitutive Androstane Receptor (CAR) Activation. Molecules 2020; 26:molecules26010164. [PMID: 33396516 PMCID: PMC7796031 DOI: 10.3390/molecules26010164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/25/2020] [Accepted: 12/28/2020] [Indexed: 11/22/2022] Open
Abstract
Constitutive androstane receptor (CAR) activation has found to ameliorate diabetes in animal models. However, no CAR agonists are available clinically. Therefore, a safe and effective CAR activator would be an alternative option. In this study, sixty courmarin derivatives either synthesized or purified from Artemisia capillaris were screened for CAR activation activity. Chemical modifications were on position 5,6,7,8 with mono-, di-, tri-, or tetra-substitutions. Among all the compounds subjected for in vitro CAR activation screening, 6,7-diprenoxycoumarin was the most effective and was selected for further preclinical studies. Chemical modification on the 6 position and unsaturated chains were generally beneficial. Electron-withdrawn groups as well as long unsaturated chains were hazardous to the activity. Mechanism of action studies showed that CAR activation of 6,7-diprenoxycoumarin might be through the inhibition of EGFR signaling and upregulating PP2Ac methylation. To sum up, modification mimicking natural occurring coumarins shed light on CAR studies and the established screening system provides a rapid method for the discovery and development of CAR activators. In addition, one CAR activator, scoparone, did showed anti-diabetes effect in db/db mice without elevation of insulin levels.
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Affiliation(s)
- Shin-Hun Juang
- School of Pharmacy, China Medical University, Taichung 404, Taiwan; (S.-H.J.); (M.-T.H.); (P.-L.H.); (J.-L.C.); (F.-P.L.); (S.-C.K.)
| | - Min-Tsang Hsieh
- School of Pharmacy, China Medical University, Taichung 404, Taiwan; (S.-H.J.); (M.-T.H.); (P.-L.H.); (J.-L.C.); (F.-P.L.); (S.-C.K.)
- Chinese Medicine Research and Development Center, China Medical University Hospital, 2 Yude Road, Taichung 404, Taiwan
| | - Pei-Ling Hsu
- School of Pharmacy, China Medical University, Taichung 404, Taiwan; (S.-H.J.); (M.-T.H.); (P.-L.H.); (J.-L.C.); (F.-P.L.); (S.-C.K.)
| | - Ju-Ling Chen
- School of Pharmacy, China Medical University, Taichung 404, Taiwan; (S.-H.J.); (M.-T.H.); (P.-L.H.); (J.-L.C.); (F.-P.L.); (S.-C.K.)
- School of Pharmacy, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan; (C.-H.C.); (T.-S.W.)
| | - Hui-Kang Liu
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112, Taiwan;
| | - Fong-Pin Liang
- School of Pharmacy, China Medical University, Taichung 404, Taiwan; (S.-H.J.); (M.-T.H.); (P.-L.H.); (J.-L.C.); (F.-P.L.); (S.-C.K.)
| | - Sheng-Chu Kuo
- School of Pharmacy, China Medical University, Taichung 404, Taiwan; (S.-H.J.); (M.-T.H.); (P.-L.H.); (J.-L.C.); (F.-P.L.); (S.-C.K.)
| | - Chen-Yuan Chiu
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei 100, Taiwan; (C.-Y.C.); (S.-H.L.)
| | - Shing-Hwa Liu
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei 100, Taiwan; (C.-Y.C.); (S.-H.L.)
| | - Chen-Hsi Chou
- School of Pharmacy, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan; (C.-H.C.); (T.-S.W.)
| | - Tian-Shung Wu
- School of Pharmacy, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan; (C.-H.C.); (T.-S.W.)
| | - Hsin-Yi Hung
- School of Pharmacy, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan; (C.-H.C.); (T.-S.W.)
- Correspondence: ; Tel.: +886-6-2353535 (ext. 6803)
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Smullen S, McLaughlin NP, Evans P. Chemical synthesis of febrifugine and analogues. Bioorg Med Chem 2018; 26:2199-2220. [PMID: 29681487 DOI: 10.1016/j.bmc.2018.04.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/10/2018] [Accepted: 04/11/2018] [Indexed: 11/30/2022]
Abstract
The quinazolinone-containing 2,3-disubstituted piperidines febrifugine and isofebrifugine have been the subject of significant research efforts since their occurrence in Dichroa febrifuga and their anti-malarial actions were first described in the late 1940s. Subsequently they have also been shown to be present in other plants belonging to the hydrangea family and various analogues of febrifugine have been prepared in attempts to tune biological properties. The most notable analogue is termed halofuginone and a substantial body of work now demonstrates that this compound possesses potent human disease relevant activities. This review focuses on the literature associated with efforts dedicated towards uncovering the structures of febrifugine and isofebrifugine, the development of practical methods for their synthesis and the syntheses of structural analogues.
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Affiliation(s)
- Shaun Smullen
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Dublin 4, Ireland
| | - Noel P McLaughlin
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Dublin 4, Ireland
| | - Paul Evans
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Dublin 4, Ireland.
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Smullen S, Evans P. Asymmetric synthesis of (−)- and (+)-neodichroine/hydrachine A from (+)- and (−)-febrifugine. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.03.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Çiçek SS, Vitalini S, Zidorn C. Natural Phenyldihydroisocoumarins: Sources, Chemistry and Bioactivity. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The present review gives an overview about naturally occurring phenyldihydroisocoumarins, their sources, and bioactivities. In total, 54 compounds are covered, including eight substances which are in fact alkaloids or protoalkaloids. These nitrogen containing compounds were exclusively found in the Papaveraceae family. The remaining 46 compounds have been reported from twelve different source families, ranging from mosses to angiosperms. Six of the nitrogen free compounds feature additional rings, while 40 are simple phenyldihydroisocoumarins with substituents in all possible positions, except 3, 2’, and 6’. Common substituents of these simple phenyldihydroisocoumarins are hydroxy groups, methoxy groups, and glucosyloxy groups; on the other hand, acuminosyloxy and rutinosyloxy groups have so far been found only in one and two naturally occurring phenyldihydroisocoumarins, respectively. Though a number of bioactivities have been proven for phenyldihydroisocoumarins, ranging from anticancer and antidiabetic to antimicrobial and anti-inflammatory activities, so far only one taxon, Hydrangea macrophylla var. thunbergii, is widely used. Moreover, the usage of this taxon is mainly due to the sweet taste properties of the contained phenyldihydroisocoumarin phyllodulcin and less based on the alleged health-promoting effects of its constituents.
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Affiliation(s)
- Serhat S. Çiçek
- Department of Pharmaceutical Biology, Kiel University, Gutenbergstraße 76, 24118 Kiel, Germany
| | - Sara Vitalini
- Department of Agricultural and Environmental Sciences, Milan State University, via Celoria 2, 20133 Milano, Italy
| | - Christian Zidorn
- Department of Pharmaceutical Biology, Kiel University, Gutenbergstraße 76, 24118 Kiel, Germany
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Abstract
This review of simple indolizidine and quinolizidine alkaloids (i.e., those in which the parent bicyclic systems are in general not embedded in polycyclic arrays) is an update of the previous coverage in Volume 55 of this series (2001). The present survey covers the literature from mid-1999 to the end of 2013; and in addition to aspects of the isolation, characterization, and biological activity of the alkaloids, much emphasis is placed on their total synthesis. A brief introduction to the topic is followed by an overview of relevant alkaloids from fungal and microbial sources, among them slaframine, cyclizidine, Steptomyces metabolites, and the pantocins. The important iminosugar alkaloids lentiginosine, steviamine, swainsonine, castanospermine, and related hydroxyindolizidines are dealt with in the subsequent section. The fourth and fifth sections cover metabolites from terrestrial plants. Pertinent plant alkaloids bearing alkyl, functionalized alkyl or alkenyl substituents include dendroprimine, anibamine, simple alkaloids belonging to the genera Prosopis, Elaeocarpus, Lycopodium, and Poranthera, and bicyclic alkaloids of the lupin family. Plant alkaloids bearing aryl or heteroaryl substituents include ipalbidine and analogs, secophenanthroindolizidine and secophenanthroquinolizidine alkaloids (among them septicine, julandine, and analogs), ficuseptine, lasubines, and other simple quinolizidines of the Lythraceae, the simple furyl-substituted Nuphar alkaloids, and a mixed quinolizidine-quinazoline alkaloid. The penultimate section of the review deals with the sizable group of simple indolizidine and quinolizidine alkaloids isolated from, or detected in, ants, mites, and terrestrial amphibians, and includes an overview of the "dietary hypothesis" for the origin of the amphibian metabolites. The final section surveys relevant alkaloids from marine sources, and includes clathryimines and analogs, stellettamides, the clavepictines and pictamine, and bis(quinolizidine) alkaloids.
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Turytsya VV, Ostapiuk YV, Matiychuk VV, Obushak MD. Synthesis of 3-Aryl/methoxycarbonyl-3,4-dihydroisocoumarin-6-carboxylic Acid Derivatives. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.1975] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Victor V. Turytsya
- Department of Organic Chemistry; Ivan Franko National University of Lviv; Kyryla i Mefodiya St. 6 Lviv 79005 Ukraine
| | - Yuri V. Ostapiuk
- Department of Organic Chemistry; Ivan Franko National University of Lviv; Kyryla i Mefodiya St. 6 Lviv 79005 Ukraine
| | - Vasyl V. Matiychuk
- Department of Organic Chemistry; Ivan Franko National University of Lviv; Kyryla i Mefodiya St. 6 Lviv 79005 Ukraine
| | - Mykola D. Obushak
- Department of Organic Chemistry; Ivan Franko National University of Lviv; Kyryla i Mefodiya St. 6 Lviv 79005 Ukraine
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McLaughlin NP, Evans P, Pines M. The chemistry and biology of febrifugine and halofuginone. Bioorg Med Chem 2014; 22:1993-2004. [PMID: 24650700 DOI: 10.1016/j.bmc.2014.02.040] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Revised: 02/14/2014] [Accepted: 02/18/2014] [Indexed: 12/11/2022]
Abstract
The trans-2,3-disubstituted piperidine, quinazolinone-containing natural product febrifugine (also known as dichroine B) and its synthetic analogue, halofuginone, possess antimalarial activity. More recently studies have also shown that halofuginone acts as an agent capable of reducing fibrosis, an indication with clinical relevance for several disease states. This review summarizes historical isolation studies and the chemistry performed which culminated in the correct structural elucidation of naturally occurring febrifugine and its isomer isofebrifugine. It also includes the range of febrifugine analogues prepared for antimalarial evaluation, including halofuginone. Finally, a section detailing current opinion in the field of halofuginone's human biology is included.
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Affiliation(s)
- Noel P McLaughlin
- Centre for Synthesis and Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Dublin 4, Ireland
| | - Paul Evans
- Centre for Synthesis and Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Dublin 4, Ireland.
| | - Mark Pines
- Agricultural Research Organization, The Volcani Center, Institute of Animal Science, P.O. Box 6, Bet Dagan 50250, Israel.
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Ullah I, Sher M, Khera RA, Ali A, Ibad MF, Villinger A, Fischer C, Langer P. Chelation-control in the formal [3+3] cyclization of 1,3-bis-(silyloxy)-1,3-butadienes with 1-hydroxy-5-silyloxy-hex-4-en-3-ones. One-pot synthesis of 3-aryl-3,4-dihydroisocoumarins. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.01.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Synthesis of 3-aryl-3,4-dihydroisocoumarins by regioselective domino ‘[3+3] cyclization/lactonization’ reactions of 1,3-bis-(silyloxy)-1,3-butadienes with 1-hydroxy-5-silyloxy-4-en-3-ones. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.07.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mhaske SB, Argade NP. The chemistry of recently isolated naturally occurring quinazolinone alkaloids. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.07.098] [Citation(s) in RCA: 453] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Affiliation(s)
- Joseph P Michael
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Wits, 2050, South Africa.
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Gyimesi-Forrás K, Kökösi J, Szász G, Gergely A, Lindner W. Liquid chromatographic enantiomer separations of novel quinazolone derivatives on quinine carbamate based chiral stationary phases using hydro-organic mobile phases. J Chromatogr A 2004; 1047:59-67. [PMID: 15481460 DOI: 10.1016/j.chroma.2004.06.090] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Quinine carbamate-type weak chiral anion-exchange selectors (SOs) and the respective chiral stationary phases (CSPs) have been used for the direct liquid chromatographic enantiomer separation of a wide range of chiral acids. In the present work, we demonstrate that these CSPs can also be extended to chiral discrimination of a set of neutral polar potential NMDA (N-methyl-D-aspartic acid) and/or AMPA (alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid) antagonist imidazo-quinazoline-dione derivatives (selectands, SAs) using acetonitrile and methanol containing hydro-organic and buffered mobile phases. The influence of mobile phase composition, column temperature and structure variation of the SAs and SOs on retention and enantioselectivity was systematically investigated to gain insight into the overall chiral recognition mechanism. As was expected for the reversed-phase mode, acetonitrile has a stronger eluotropic effect compared to methanol. Except for two analytes, the acetonitrile containing mobile phases provided baseline resolution (R(S)) of the enantiomers with R(S) values ranging between 1.68 and 2.76. Using methanol as the organic modifier enhanced the enantioselectivity. The enthalpic and entropic terms for the SO-SA association were calculated from the linear van't Hoff plots. Data reveal that the enantiomer separations are predominantly enthalpically driven.
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Affiliation(s)
- Krisztina Gyimesi-Forrás
- Institute of Analytical Chemistry, University of Vienna, Währingerstasse 38, A-1090 Vienna, Austria
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Chang FR, Lee YH, Yang YL, Hsieh PW, Khalil AT, Chen CY, Wu YC. Secoiridoid glycoside and alkaloid constituents of Hydrangea chinensis. JOURNAL OF NATURAL PRODUCTS 2003; 66:1245-1248. [PMID: 14510608 DOI: 10.1021/np0302394] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A new secoiridoid glycoside, hydrachoside A (1), along with 14 known compounds, was isolated from the leaves of Hydrangea chinensis. The absolute stereochemistry of the side chain attached to C-15 on the secoiridoid glycoside hydrangenoside E (2) was determined by NMR spectral analysis. The structures of compounds 1 and 2 were elucidated on the basis of spectral data. The previously reported structure, hydrachine A (3), was revised as its epimer, (-)-neodichroine (4), a new compound.
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Affiliation(s)
- Fang-Rong Chang
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan, Republic of China
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Pan WB, Chang FR, Wei LM, Wu YC. New flavans, spirostanol sapogenins, and a pregnane genin from Tupistra chinensis and their cytotoxicity. JOURNAL OF NATURAL PRODUCTS 2003; 66:161-168. [PMID: 12608845 DOI: 10.1021/np0203382] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Seven new compounds, including three new flavans [tupichinol A-C (1-3)], three new spirostanol sapogenins [tupichigenin D-F (4-6)], and one new pregnane genin [tupipregnenolone (7)], together with 18 known compounds, were isolated from the underground parts of Tupistra chinensis. The structures of the new compounds were elucidated by spectroscopic analysis and chemical evidence. The structures and relative stereochemistry of 1 and 9 were further confirmed by single-crystal X-ray crystallographic analysis. Compounds Delta(25(27))-pentrogenin, 10, and ranmogenin A showed 100%, 96%, and 80% inhibition, respectively, against human gastric tumor (NUGC) cells at a concentration of 50 microM. Delta(25(27))-pentrogenin showed 100% inhibition against human nasopharyngeal carcinoma (HONE-1) cells at a concentration of 50 microM.
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Affiliation(s)
- Wen-Bin Pan
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan
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Khalil AT, Chang FR, Lee YH, Chen CY, Liaw CC, Ramesh P, Yuan SSF, Wu YC. Chemical constituents from the Hydrangea chinensis. Arch Pharm Res 2003; 26:15-20. [PMID: 12568351 DOI: 10.1007/bf03179924] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Two quinazolone alkaloids, (+)-febrifugine (1) and isofebrifugine (2), along with three coumarin derivatives, 6-hydroxy coumarin (3), skimmin (5), and umbelliferone-7-O-alpha-L-rhamnopyranosyl(1-->4)-beta-D-glucopyranoside (6), were isolated from the roots of Hydrangea chinensis. Compound 6 is a new compound. In addition, umbelliferone (4), linoleic acid (7), two steroidal glycosides (8, 9), three furfural derivatives (10-12), and butyl-beta-D-fructofuranoside (13) were isolated from the leaves of the same plant. The structures of all isolates were elucidated by spectral methods.
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Affiliation(s)
- Ashraf Taha Khalil
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan
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