Flavone C-glycosides from flowers of Trollius ledebouri

Four flavone C-glycosides, 2″-O-vanilloylvitexin (1), 2″-O-feruloylorientin (2), 2″-O-β-l-galactopyranosylvitexin (3), and 2″-O-β-l-galactopyranosylorientin (4), were isolated from the flowers of Trollius ledebouri, respectively.