Three oleanolic acid glycosides from the seeds of Achyranthes aspera

Abstract

From the seeds of Achyranthes aspera three triterpenoid glycosides were isolated and their structures elucidated on the basis of NMR spectroscopic, mass spectrometrc and degradative studies as α-L-rhamnopyranosyl-(1→4)- (β-D-glucopyranosyluronic acid)-(1→3)-oleanolic acid, α-L-rhamnopyranosyl-(1→4)-(β-D-glucopyranosyluronic acid)-(1→3)-oleanolic acid-28-O-β-D-glucopyranoside and α-L-rhamnopyranosyl-(1→4)-(β′-D-glucopyranosyluronic acid)-(1→3)-oleanolic acid-28-O-β-D-glucopyranosyl-(1→4)-β- D-glucopyranoside.