Abstract
Four new saponins, 3-O-[β-D-glucopyranosyl(1→3)-α-L-arabinopyranosyl]-16α-hydroxyolenolic acid 28-O-β-D-glucopyranosyl ester (called aralia-saponin I), 3-O-[β-D-glucopyranosyl(1→3)-α-L-arabinopyranosyl]-16α-hydroxyhederagenin 28-O-β-D-glucopyranosyl ester (aralia-saponin II), 3-O-[β-D-glucopyranosyl(1→3)-β-D-glucopyranosyl(1→3)-α-L-arabinopyranosyl]-16α-hydroxyloleanolic acid 28-O-β-D-glucopyranosyl ester (araliasaponin III), 3-O-[β-D-glucopyranosyl(1→3)-β-D-glucopyranosyl(1→3)-β-D-glucopyranosyl]-16α-hydroxyoleanolic acid 28-O-β-D-glucopyranosyl ester (aralia-saponin IV), were isolated form the root bark of Aralia elata (Miq.)Seem., together with nineteen known compounds including glycosides of (20S)-protopanaxadiol and (20S)-pro-topanaxatriol. Their structures were determined on the basis of chemical and spectrocopy methods.
