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Zhao P, Lou LL, Xin BS, Li ZY, Guo R, Zhou WY, Lv TM, Huang XX, Song SJ. Rapid determination of the relative configuration of diverse 8,4'-oxyneolignans by NMR analysis: Retrospective studies, improvement and structural revision. Phytochemistry 2023; 214:113801. [PMID: 37499851 DOI: 10.1016/j.phytochem.2023.113801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/29/2023] [Accepted: 07/25/2023] [Indexed: 07/29/2023]
Abstract
The characteristic 1H NMR signals (H-7 and H2-9) are significant parameters that have been widely used to assess the relative configuration of H-7 and H-8 of 8,4'-oxyneolignans. However, many usual 8,4'-oxyneolignans cannot be accurately determined by existing NMR methods and no research considering their limitations was performed until now. In this study, the application scope of NMR methods was comprehensively studied and the ΔδH9a-H9b methods have been extended to solve the majority of configuration determination difficulties. The accuracy of extended NMR methods was verified by anisotropic NMR (RCSA measurements), NMR calculation and diverse statistical analysis (MAEΔΔδ, CP3 and DP4+). Furthermore, the theoretical conformational analysis was performed to investigate the inherent limitations of existing NMR methods. This study could provide a valuable reference for determining the relative configuration of H-7 and H-8 in 8,4'-oxyneolignans and the relative configuration of 23 recently reported 8,4'-oxyneolignan derivatives should be reassigned as well.
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Affiliation(s)
- Peng Zhao
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, China; Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, China; Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Li-Li Lou
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, China; Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, China; Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Ben-Song Xin
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, China; Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, China; Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Zhi-Yuan Li
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, China; Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, China; Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Rui Guo
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, China; Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, China; Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Wei-Yu Zhou
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, China; Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, China; Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Tian-Ming Lv
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, China; Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, China; Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Xiao-Xiao Huang
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, China; Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, China; Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China.
| | - Shao-Jiang Song
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, China; Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, China; Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China.
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Wu Z, Guo H, Wu Q, Jiang M, Chen J, Chen B, Li H, Liu L, Chen S. Absolute configuration of cyclopropanes and the structural revision of pyrones from Marine-derived fungus Stagonospora sp. SYSU-MS7888. Bioorg Chem 2023; 136:106542. [PMID: 37087848 DOI: 10.1016/j.bioorg.2023.106542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 04/04/2023] [Accepted: 04/11/2023] [Indexed: 04/25/2023]
Abstract
Two new cyclopropane derivatives (1-2) and seven undescribed α-pyrone derivatives (3-9), along with one known congener (10) were obtained from the marine fungus Stagonospora sp. SYSU-MS7888, which was isolated from the South China Sea. Their planar structures were established through extensive spectroscopic analyses including 1D and 2D NMR and HR-ESIMS. The absolute configurations were identified on basis of the quantum chemical calculations of ECD and NMR, as well as the modified Mosher's method. It's particularly noteworthy that the tetrasubstituted furopyrans, chenopodolans A-F, possessing phytotoxicity and zootoxicity, were structural misassignments. The structures of chenopodolans featuring with furopyran skeleton were revised as common trisubstituted α-pyrones by computational chemistry, NMR spectroscopic method, and empirical rule. Compounds 1, 2, 7, and 9 showed significant anti-inflammatory activity with IC50 values ranging from 3.6 to 22.8 μM, which is better than the positive control indomethacin (IC50 = 26.5 ± 1.13 μM). This discovery holds potential for the development of new anti-inflammatory agents.
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Affiliation(s)
- Zhenger Wu
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519000, China
| | - Heng Guo
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519000, China
| | - Qilin Wu
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519000, China
| | - Minghua Jiang
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519000, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
| | - Junjie Chen
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519000, China
| | - Bin Chen
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
| | - Hanxiang Li
- Institutional Center for Shared Technologies and Facilities, South China Botanical Garden, Chinese Academy of Sciences (CAS), Guangzhou 510650, China
| | - Lan Liu
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519000, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
| | - Senhua Chen
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519000, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China; Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, China.
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3
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Zlatković DB, Đorđević Zlatković MR, Radulović NS. On the configuration and occurrence of 2,6-cyclocuparan-3-ols: Resolving a lasting discrepancy. Phytochemistry 2023; 207:113566. [PMID: 36549382 DOI: 10.1016/j.phytochem.2022.113566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
2,6-Cyclocuparan-3-ols are chemical markers and major volatiles of several liverwort species. Conflicting reports on the structures of these cyclocuparanols can be found in the literature-different research groups assigned the same spectral data to different structures, yet these inconsistencies were never addressed, let alone satisfactorily explained. Following the isolation of all four diastereoisomeric cyclocuparanols from Marchantia polymorpha, their relative and absolute configurations were extensively studied by chemical and spectroscopic methods and definite stereostructures were proposed.
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Affiliation(s)
- Dragan B Zlatković
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia
| | - Miljana R Đorđević Zlatković
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia
| | - Niko S Radulović
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia.
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Bai M, Xu W, Zhang X, Li Q, Du NN, Liu DF, Yao GD, Lin B, Song SJ, Huang XX. HSQC-based small molecule accurate recognition technology discovery of diverse cytotoxic sesquiterpenoids from Elephantopus tomentosus L. and structural revision of molephantins A and B. Phytochemistry 2023; 206:113562. [PMID: 36526100 DOI: 10.1016/j.phytochem.2022.113562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/08/2022] [Accepted: 12/11/2022] [Indexed: 06/17/2023]
Abstract
Elephantopus tomentosus L. is a perennial herb taxonomically belonging to the family Asteraceae, which has been used as a folk medicine for the treatment of hepatobiliary diseases. Sesquiterpenoids from this plant have broad biological activities, including anti-tumor, anti-inflammatory, and antibacterial effects. In this study, fifteen structurally diverse sesquiterpenoids comprised 11 germacrane-type and 4 eudesmane-type sesquiterpenoids were prioritized to isolated from Elephantopus tomentosus L. based on the HSQC-based Small Molecule Accurate Recognition Technology (SMART) strategy. Among them, ten sesquiterpenoids were previously unreported, and their structures were elucidated by spectroscopic data, computational methods, single-crystal X-ray diffraction crystallographic data or electronic circular dichroism calculations. In addition, the structures of two known sesquiterpenoids, molephantin A and B, which were reported to possess E-geometry for the Δ1(10) double bond, were revised by reanalyzing their spectroscopic and X-ray crystallographic data. Some sesquiterpenoids exhibited significant cytotoxic activities against Hep3B and HepG2 cell lines.
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Affiliation(s)
- Ming Bai
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, People's Republic of China
| | - Wei Xu
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, People's Republic of China
| | - Xin Zhang
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, People's Republic of China
| | - Qian Li
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, People's Republic of China
| | - Ning-Ning Du
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, People's Republic of China
| | - De-Feng Liu
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, People's Republic of China
| | - Guo-Dong Yao
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, People's Republic of China
| | - Bin Lin
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, 110016, People's Republic of China
| | - Shao-Jiang Song
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, People's Republic of China
| | - Xiao-Xiao Huang
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, People's Republic of China.
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Yu B, Wang S. Solving the Structural Puzzles of Amipurimycin and Miharamycins Enabled by Stereodivergent Total Synthesis. CHEM REC 2021; 21:3015-3028. [PMID: 33835677 DOI: 10.1002/tcr.202100057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/30/2021] [Accepted: 03/30/2021] [Indexed: 11/09/2022]
Abstract
The efforts toward the synthesis of amipurimycin and miharamycin A/B, two peptidyl nucleoside antibiotics bearing a unique nine carbon C3-branched pyranosyl amino acid core, are accounted. Highlighted is our stereodivergent total synthesis of all the possible diastereoisomers of amipurimycin, which has enabled us to solve the structural puzzles of amipurimycin and miharamycin A/B after ∼50 years of their discovery.
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Affiliation(s)
- Biao Yu
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024, China.,State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Shengyang Wang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China.,Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China
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Hu K, Li XR, Tang JW, Li XN, Puno PT. Structural determination of eleven new preschisanartane-type schinortriterpenoids from two Schisandra species and structural revision of preschisanartanin J using NMR computation method. Chin J Nat Med 2019; 17:970-81. [PMID: 31882053 DOI: 10.1016/S1875-5364(19)30120-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Indexed: 11/23/2022]
Abstract
Nineteen preschisanartane-type schinortriterpenoids (SNTs), among which eleven ones were previously undescribed, were isolated from two Schisandra species, S. sphaerandra and S. rubriflora. Their structures were determined using 1D and 2D NMR spectroscopic analyses, NMR data comparison, quantum chemical calculation of NMR parameters, electronic circular dichroism (ECD), X-ray single crystal diffraction, and chemical derivation. Furthermore, structural re-examination of a few previously reported preschisanartane-type SNTs led to the structural revision of preschisanartanin J. Besides, it is suggested that the reported structures of arisanlactone D and schilancidilactone W should be re-checked. Finally, a few isolated SNTs were found to possess neurite outgrowth-promoting activities, and protective activities against neural injuries.
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Wang LX, Jiang XJ, Li XM, Mao MF, Wei GZ, Wang F. Aristolane-type Sesquiterpenoids from Nardostachys chinensis and Revised Structure of Aristolanhydride. Nat Prod Bioprospect 2019; 9:149-155. [PMID: 30848431 PMCID: PMC6426942 DOI: 10.1007/s13659-019-0200-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 02/21/2019] [Indexed: 06/09/2023]
Abstract
Four hitherto unknown aristolane-type sesquiterpenes, including one novel 8,9-secoaristolane, namely secoaristolenedioic acid (1), two aristolone derivatives, namely 1α,2β-dihydroxyaristolone (2), 9-epidebilon (3), and one rare aristolane-chalcone hybrid, namely 3'-hydroxynardoaristolone A (4) were isolated from the ethanol extract of the roots and rhizomes of Nardostachys chinensis. Their structures were elucidated on the basis of extensive spectroscopic analysis. In addition, the structure of aristolanhydride, recently isolated from the same species, was corrected by reanalysis of the published NMR data.
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Affiliation(s)
- Li-Xia Wang
- BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China
- Reference Substances Sub-center, National Engineering Research Center for Modernization of Traditional Chinese Medicine, Kunming, 650201, People's Republic of China
| | - Xian-Jun Jiang
- BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China
- Reference Substances Sub-center, National Engineering Research Center for Modernization of Traditional Chinese Medicine, Kunming, 650201, People's Republic of China
| | - Xiang-Mei Li
- BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China
- Reference Substances Sub-center, National Engineering Research Center for Modernization of Traditional Chinese Medicine, Kunming, 650201, People's Republic of China
| | - Mei-Fen Mao
- BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China
- Reference Substances Sub-center, National Engineering Research Center for Modernization of Traditional Chinese Medicine, Kunming, 650201, People's Republic of China
| | - Guo-Zhu Wei
- BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China
- Reference Substances Sub-center, National Engineering Research Center for Modernization of Traditional Chinese Medicine, Kunming, 650201, People's Republic of China
| | - Fei Wang
- BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China.
- Reference Substances Sub-center, National Engineering Research Center for Modernization of Traditional Chinese Medicine, Kunming, 650201, People's Republic of China.
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Konishi S, Mori N, Takikawa H, Watanabe H. Synthesis-guided structure revision of the monoterpene alcohol isolated from Mentha haplocalyx. Biosci Biotechnol Biochem 2018; 83:391-399. [PMID: 30526372 DOI: 10.1080/09168451.2018.1549936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The monoterpene isolated from Mentha haplocalyx, 3,3,5-trimethyl-2-oxabicyclo[2.2.2]oct-5-en-4-ol, was synthesized according to its proposed structure. However, the NMR data of the synthetic sample were not in agreement with those reported for the natural product. After considerable efforts, the genuine structure was confirmed as (1R*,2R*)-4-(1'-hydroxy-1'-methylethyl)-1-methylycyclohex-3-ene-1,2-diol.
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Affiliation(s)
- Shunsuke Konishi
- a Department of Applied Biological Chemistry , Graduate School of Agricultural and Life Sciences, The University of Tokyo , Tokyo , Japan.,b Technical Research Institute, R&D Center, T. Hasegawa Co., Ltd ., Kawasaki , Kanagawa , Japan
| | - Naoki Mori
- a Department of Applied Biological Chemistry , Graduate School of Agricultural and Life Sciences, The University of Tokyo , Tokyo , Japan
| | - Hirosato Takikawa
- a Department of Applied Biological Chemistry , Graduate School of Agricultural and Life Sciences, The University of Tokyo , Tokyo , Japan
| | - Hidenori Watanabe
- a Department of Applied Biological Chemistry , Graduate School of Agricultural and Life Sciences, The University of Tokyo , Tokyo , Japan
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