Polyphenols of Egyptian Rosaceae plants - two new flavonoid glycosides from Sanguisorba minor Scop.

Two new flavonol glycosides, 8-methoxyquercetin-3-O-beta-glucosyl-(1'''-2{''})-O-beta-glucoside and kaempferol-3-O-{[}2{''}'-galloyl-o-beta-glucosyl-(1{''}'-2{''})-O-beta-g lucoside)], together with five known quercetin and kaempferol 3-O-mono-glycosides, were isolated and identified from the aerial parts of Sanguisorba minor Scop. (Rosaccae). All structures were determined by routine methods of analysis and confirmed mostly by negative ESI-MS, H-1- and C-13 NMR.