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Catechin-3-0-rhamoside chain procyanidins from mangrove bark

Informally Refereed

Abstract

Acid-catalysed cleavage of 'purified' condensed tannin isolates from Bruguiera gymnorrhiza (tancang) bark in the presence of phloroglucinol as a capture nucleophile gave, in addition to the expected procyanidin- and prodelphinidin-phloroglucinol adducts, 3-O-α-L-rhamnopyranosyl-(+)-catechin-(4α→2)-phloroglucinol, thus providing evidence for covalently bonded glycoside moieties in the chain extender units of mangrove bark tannins.

Keywords

Bruguiera gymnorrhiza, Rhizophoraceae, angrove, bark, condensed tannins, proanthocyanidins, 3-0-&#945, -L-rhamnopyranosyl-{+)-catechin-{4&#945, &#8594, 2)-phloroglucinol, flavan-3-ol glycosides

Citation

Achmadi, Suminar; Syahbirin, Gustini; Chonng, Elvin T.; Hemingway, Richard W. 1994. Catechin-3-0-rhamoside chain procyanidins from mangrove bark. Phytochemistry 35(1):217-219
https://www.fs.usda.gov/research/treesearch/7964