Triterpenoidal Saponins from the Bark of Kalopanax pictum var. typicum

One new triterpenoidal saponin, saponin F(2) has been isolated from the bark of Kalopanax pictum Nakai var. typicum (Araliaceae), together with one known saponin, kizuta saponin $K_{12}$ (1). On the basis of chemico-spectral evidences, the structure of 2 has been elucidated to be 3-O-${\beta}$-D-xylopyranosyl$(1{\rightarrow}3)$-${\alpha}$-L-rhamnopyranosyl$(1{\rightarrow}2)$-${\alpha}$-L-arabinopyranosyl-23-hydroxyolean-12-en-28-O-${\alpha}$-L-rhamnopyranosyl$(1{\rightarrow}4)$-${\beta}$-D-glucopyranosyl$(1{\rightarrow}6)$-${\beta}$-D-glucopyranosyl ester.