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

概要

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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.
社団法人日本薬学会の論文
1991-05-25