Flavonoids of polygonum Senegalense part iii: Isolation of dihydrochalcone glucoside and quercetin glucosides

Abstract

The internal tissue flavonoids of P. senegalense are glycosides, based mostly on quercetin. Chromatography on silica gel and Sephadex LH-20 of the hydrophilic extract resulted in the isolation and characterizationof quercetin-3-1l-0-galactoside(1), quercetin-3-f3-0-glucoside (2), quen:etin-3-(2" -galloylglucoside) (3) and a new compound 2' -glucosyl-4' -hydroxy-6'- methoxydihydrochalcone (or uvangolatin-Z' -B-O-glucoside) (4).