Occurrence of C-Glucoside of Resveratrol Oligomers in Hopea parviflora
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概要
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Investigation of the highly polar chemical constituents in the stem of Hopea parviflora (Dipterocarpaceae) resulted in the isolation of four new resveratrol derivatives, hopeasides A and B (1, 2) (resveratrol pentamers), C (3) (resveratrol trimer), and D (4) (resveratrol dimer) together with nine known resveratrol oligomers (5—13). The new structures have a common partial structure of the 1-hydroxy-1-(3,5-dihydroxy-2-C-glucopyranosylphenyl)-2-(4-hydroxyphenyl)ethane-2-yl group after oxidative condensation of (E)-resveratrol-10-C-β-glucopyranoside (14). The structures were determined by spectroscopic analysis including 2D-NMR and computer-aided molecular modeling. The biogenetic relationship of the isolates and NMR characteristics caused by steric hindrance are also discussed in this paper.
著者
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TAKAHASHI Yoshikazu
Institute for Super Materials, ULVAC Japan Ltd.
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SAWA Ryuichi
Institute of Microbiol Chemistry
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Abe Naohito
Laboratory of Pharmacognosy, Gifu Pharmaceutical University
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Ito Tetsuro
Laboratory of Pharmacognosy, Gifu Pharmaceutical University
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Oyama Masayoshi
Laboratory of Pharmacognosy, Gifu Pharmaceutical University
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Chelladurai Veliah
Survey of Medicinal Plant Unit, Central Council for Research in Ayurveda and Siddha
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Iinuma Munekazu
Laboratory of Pharmacognosy, Gifu Pharmaceutical University
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Ito T
Dep. Of Bioactive Molecules Pharmacognosy Gifu Pharmaceutical Univ.
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Sawa Ryuichi
Institute Of Microbial Chemistry
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Ohyama M
Cancer Prevenition Division National Cancer Center Research Instiute
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Ito Tetsuro
Department Of Bioactive Molecutes Pharmacognosy Gifu Pharmaceutical University
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Chelladurai Veliah
Survey Of Medicinal Plant Unit Central Council For Res. In Ayurveda And Siddha
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Ito T
Gifu Prefectrual Inst. Health And Environmental Sci. Kakamigahara Jpn
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Oyama Masayoshi
Laboratory Of Pharmacognosy Gifu Pharmaceutical University
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