Three new oleanolic acid glycosides, tarasaponins I-III, were isolated
as their methyl esters from the root bark of Aralia elata together wi
th four known glycosides, the methyl esters of chikusetsusaponins IVa,
IV, 28-desglucosyl-chikusetsusaponin IV and pseudoginsenoside RT(1).
Tarasaponins I-III were characterized as oleanolic acid abinofuranosyl
(1-->4)]-beta-D-glucuronopyranoside, oleanolic acid alactopyranosyl(1-
->3)]-beta-D-glucuronopyranoside and beta-D-glucopyranosyl oleanolate
alactopyranosyl(1-->3)-beta-D-glucuronopyranoside, respectively.