Author:
Tanaka Nobutoshi,Ushioda Toshiyuki,Fuchino Hiroyuki,Braggins John E.
Abstract
From the fronds of Pneumatopteris pennigera, four new
flavan-4-ol glycosides, named pneu- matopterins A, B, C and D, were isolated.
Their structures were determined as
(2S,4R)-5,7-di-β-D-glucopyranosyloxy-6-hydroxymethyl-8-methylflavan-4-ol,
(2S,4R)-5,7-di-β-D-glucopyranosyloxy-6,8-dimethylflavan-4-ol,
(2S,4R)-5-β-D-glucopyranosyloxy-7-hydroxy-6-hydroxymethyl-8-methyl-4,2′′-oxo-flavan,
and
(2S,4R)-5-β-D-glucopyranosyloxy-7-hydroxy-6,8-dimethyl-4,2′′-oxo-flavan,
respectively, on the basis of spectroscopic data and chemical correlations.
Cited by
11 articles.
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