Oleanolic acid saponins from root bark of Aralia elata
1994
Sakai, S. | Katsumata, M. | Satoh, Y. | Nagasao, M. | Miyakoshi, M. | Ida, Y. | Shoji, J.
Three new oleanolic acid glycosides, tarasaponins I-III, were isolated as their methyl esters from the root bark of Aralia elata together with four known glycosides, the methyl esters of chikusetsusaponins IVa, IV, 28-desglucosyl-chikusetsusaponin IV and pseudoginsenoside RT1. Tarasaponins I-III were characterized as oleanolic acid 3-O-[beta-D-glucopyranosyl(1 leads to 3)][alpha-L-arabinofuranosyl(1 leads to 4)]-beta-D-glucuronopyranoside, oleanolic acid 3-O-[beta-D-xylopyranosyl(1 leads to 2)][beta-D-galactopyranosyl(1 leads to 3)]-beta-D-glucuronopyranoside and beta-D-glucopyranosyl oleanolate 3-O-beta-D-galactopyranosyl(1 leads to 3)-beta-D-glucuronopyranoside, respectively.
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