Author:
Amakura Yoshiaki,Kawada Keita,Hatano Tsutomu,Okuda Takuo,Yoshida Takashi,Agata Isao,Sugaya Takeshi,Nishibe Sansei
Abstract
The structure of a new acylated flavonol glycoside from the leaf extract of Euphorbiamaculata was characterized as quercetin 3-O-(2″,3″-di-O-galloyl)-β-D-glucopyranoside. Four new hydrolyzable tannins together with twelve known tannins were also isolated and their structures were established by spectral and chemical means as 1,2,6-tri-O-galloyl-α-D-glucose, 1-O-galloyl-2,4;3,6-di-O-chebuloyl-β-D-glucose (eumaculin E), and dimers (eumaculins B and D) having a tergalloyl and a macaranoyl group as the linking unit of monomers, respectively. Keywords: Euphorbiamaculata, Euphorbiaceae, tannin, eumaculin B, eumaculin E.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
19 articles.
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