New Galloylated Flavonoid Glycosides from <i>Geranium stepporum</i><scp>Davis</scp>

Abstract

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).