TRITERPENOID SAPONINS FROM THE BARK OF NOTHOPANAX-DAVIDII

Three new triterpenoid saponins were isolated from the alcoholic extra ct of the bark of Nothopanax davidii. Their structures have been deter mined on the basis of spectral and chemical data as 3-O-alpha-(4'-O-ac etyl)-L-arabinopyranosyl-3 beta-hydroxyolean-12-ene-28,29-dioic acid-2 8-O-[alpha-L-rhamnopyranosyl(1 --> 4)-beta-D-glucopyranosyl (1 --> 6)- beta-D-glucopyranosyl]ester, named yiyeliangwanoside IX; 3-O-alpha-(2' -O-acetyl)-L-arabinopyranosyl-3 beta-hydroxyolean 12-ene-28,29-dioic a cid-28-O-[alpha-L-rhamnopyranosyl(1 --> 4)-beta-D-glucopyranosyl( 1 -- > 6)-beta-D-glucopyranosyl] ester, named yiyeliangwanoside X; and 3-O- beta-D-xylopyranosyl-3 beta-hydroxyolean-12-ene-28,29-dioic acid-28-O- [alpha-L-rhamnopyranosyl(1 --> 4)-beta-D-glucopyranosyl(1 --> 6)-beta- D-glucopyranosy]lester, named yiyeliangwanoside XI.