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Title
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Dimeric and trimeric proanthocyanidins possessing a doubly linked structure from **Pavetta owariensis**
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Author
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Abstract
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| Pavetannin A-2, a new A-type proanthocyanidin, along with the trimers cinnamtannin B-1, pavetannin B-1, B-2, B-3, B-5 and B-6 have been isolated in their free phenolic form from the stem bark of Pavetta owariensis. Spectral data and partial acid-catalysed degradation established their structures as ent-epicatechin-(4-alpha --> 8,2-alpha --> O --> 7)-catechin, epicatechin-(4-beta --> 8,2-beta --> O --> 7)-epicatechin-(4-alpha --> 8)-epicatechin, epicatechin-(4-beta --> 8,2-beta --> O --> 7)-epicatechin-(4-beta --> 8)-ent-epicatechin, epicatechin-(4-beta --> 8,2-beta --> O --> 7)-epicatechin-(4-beta --> 8)-epicatechin, epicatechin-(4-beta --> 6,2-beta --> O --> 7)-epicatechin-(4-beta --> 8)-epicatechin, epicatechin-(4-beta --> 6,2-beta --> O --> 7)-catechin-(4-beta --> 8)-epicatechin, epicatechin-(4-beta --> 8,2-beta --> O --> 7)-epicatechin-(4-alpha --> 8)-catechin, respectively. |
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Language
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English
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Source (journal)
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Phytochemistry: an international journal of plant biochemistry. - Oxford
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Publication
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Oxford
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1991
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ISSN
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0031-9422
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Volume/pages
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30
:12
(1991)
, p. 4129-4135
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ISI
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A1991GY73700060
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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