Title
Dimeric and trimeric proanthocyanidins possessing a doubly linked structure from **Pavetta owariensis** Dimeric and trimeric proanthocyanidins possessing a doubly linked structure from **Pavetta owariensis**
Author
Faculty/Department
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Publication type
article
Publication
Oxford ,
Subject
Chemistry
Biology
Source (journal)
Phytochemistry: an international journal of plant biochemistry. - Oxford
Volume/pages
30(1991) :12 , p. 4129-4135
ISSN
0031-9422
ISI
A1991GY73700060
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
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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