Triterpenoid glycosides from bark of Meliosma lanceolata

From the bark of Meliosma lanceolate, nine triterpenoid glycosides including the 28-O-β- d -glucopyranosyl ester of bayogenin -3-O-β- d -glucuronopyranoside , its 4′-O-β- d -galactopyranoside and 4′-O-α- l -arabinopyranoside were isolated and the structures characterized along with that of 28-O-β- d -glucopyranosyl-bayogenin -3-O-β- d -4′- anhydro -4′,5′- didehydroglucuronopyranoside . Bisdesmosidic triosides of hederagenin were obtained as minor components.