Two new flavone glycosides from <i>Polygonum viviparum </i>L.

167-169Two novel flavone glycosides, 5,4'-dimethoxyl-6,7-methylenedioxyflavone-3-O-β--xylopyranoside (viviparum A), 3'-hydroxy-5,4' -dimethoxy-6, 7-methylenedioxyflavone-3- O-β--xylopyranoside (viviparum B), have been isolated along with seven known flavones and their structures have been deduced on the basis of their spectral data and chemical studies. This is the first report on the isolation of flavone glycosides from Polygonum viviparum