Chemical constituents from Polygonum multiflorum

Abstract

Six compounds were isolated from the ethyl acetate extract of the tuberous root of Polygonum multiflorum by silical gel, ODS revsered-phase silica gel, Sephadex LH-20, and preparative HPLC. The structures were elucidated as column chromatography over： 2, 3, 5, 4'-tetrahydroxystilbene-2-O-(2″-O-p-hydroxybenzoyl)-β-D-glucoside(1),2, 3, 5, 4'-tetrahydroxystilbene-2-O-β-D-glucoside(2),2, 4, 6, 4'-tetrahydroxystilbene-2-O-β-D-glucoside(3), emodin-8-O-β-D-glucopyranoside(4), physcion-8-O-β-D-glucopyranoside(5), and 8-O-methyl-emodin(6) on the basis of spectral analysis. Compound 1 is a new stilbene glycoside.