A Chemotaxonomic Study of Flavonoids from Japanese Polygonum Species

Abstract

The flavonoids, eight quercetin-3-O-glycosides, two kaempferol-3-O-glycosides, myricetin-3-O-glucoside, quercetin, kaempferol and gallic acid in twenty-two native Polygonum species in Japan were identified by the comparison of mass spectroscopy and the several thin layer chromatography techniques. It has been evident that flavonol glycoside, especially, quercetin glycoside was widely distributed in Polygonum species and that the plantlet of P. nodosum contained flavonol-3-O-glycoside-2"-gallate as a main component.