New Galloylated Flavonoid Glycosides from Geranium stepporum Davis

Abstract magnified image Two new galloylated flavonoid glycosides, quercetin‐3‐O‐(3″‐O‐galloyl)‐β‐glucopyranoside (1) and quercetin‐3‐O‐(3″‐O‐galloyl)‐β‐galactopyranoside (2) were isolated from the aerial parts of Geranium stepporum along with the four known flavonoids, quercetin 3‐O‐β‐glucopyranoside (3), quercetin 3‐O‐β‐galactopyranoside (4), quercetin 3‐O‐(6″‐O‐galloyl)‐β‐glucopyranoside (5) and quercetin 3‐O‐(6″‐O‐galloyl)‐β‐galactopyranoside (6). The structure elucidation of the isolated compounds was accomplished by spectroscopic methods (UV, 1D‐ and 2D‐NMR, and ESI‐TOF‐MS).