Acylated apigenin glycosides from alfalfa (Medicago sativa L.) var. Artal

Abstract

Three flavones, including 4′-O-[2′-O-E-feruloyl-O-β- -glucuronopyranosyl(1→2)-O-β- -glucuronopyranoside]apigenin, 7-O-β- -glucuronopyranosyl-4′-O-[2′-O-E-feruloyl-O-β- -glucuronopyranosyl(1→2)-O-β- -glucuronopyranoside]apigenin and 7-O-β- -glucuronopyranosyl-4′-O-[2′-O-p-E-coumaroyl-O-β- -glucuronopyranosyl(1→2)-O-β- -glucuronopyranoside]apigenin have been identified in alfalfa var. Artal. The known flavone 7-O-{2-O-E-feruloyl-[β- -glucuronopyranosyl(1→3)]-O-β- -glucuronopyranosyl(1→2)-O-β- -glucurono-pyranoside} apigenin was also isolated. The structures of these compounds were deduced on the basis of their spectral data.