Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
Tannins and Related Compounds. CVIII. Isolation and Characterization of Novel Complex Tannins (Flavono-ellagitannins), Anogeissinin and Anogeissusins A and B, from Anogeissus acuminata (ROXB ex DC.) GUILL. et PERR. var. lanceolata WALL. ex CLARKE
Ta-Chen LINTakashi TANAKAGen-ichiro NONAKAItsuo NISHIOKATsuong-Jen YOUNG
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1991 Volume 39 Issue 5 Pages 1144-1147

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Abstract

Three novel complex tannins (flavano-ellagitannins), anogeissinin (9) and anogeissuisins A (10) and B (11), have been isolated from the bark of Anogeissus acuminata (ROXB. ex DC.) GUILL. et PERR. var. lanceolata WALL. ex CLARKE (Combretaceae), together with eight known C-glycosidic hydrolyzable tannins. On the basis of spectroscopic and chemical evidence, anogeissinin (9) was shown to have two C-glycosidic ellagitannin (vescalagin) moieties connected to the C-6 and C-8 positions in the (+)-catechin moiety, while anogeissusins A (10) and B (11) have structures in which the dimeric C-glycosidic ellagitannin, castamollinin (8), is attached to the C-8 position of the (+)-catechin and (+)-gallocatechin moieties, respectively.

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© The Pharmaceutical Society of Japan
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