Chemical constituents of rhizome of Panacis Majoris

Objective To study the chemical constituents of Panacis Majoris(the rhizome of [Panax janonicus C.A.Mey.var.major(Buck.)C.Y.Wu et K.M.Feng]).Methods The chemical constituents were isolated by various column chromatographic methods,and the structures of these compounds were identified by MS,1H-NMR and 13C-NMR spectral analysis.Results Eight compounds were isolated and elucidated as:benzoic acid(1),stigmasterol(2),oleanolic acid(3),daucosterol(4),oleanolic acid-28-O-β-D-glucopyranoside(5),oleanolic acid-3-O-β-D-glucopyranoside(1→2)-β-D-glucorunopyranosy-6′-O-butyl ester(6),chikusetsusaponin IVa(7) and ginsenoside Ro(8),respectively.Conclusions Compound 6 is a new compound and compounds 1 and 2 are obtained from this plant for the first time.