Structures of four new triterpenoid saponins from the leaves of Oplopanax elatus Nakai, VII

Four new triterpenoid saponins, named as cirenshenosides S(1), T(2), U(3) and V(4), were isolated from the leaves of Oplopanax elatus Nakai. Their structures were elucidated to be 28-O-α-L-rhamnopyranosyl(1 → 4)- β- D-glucopyranosyl (1 → 6)- β- D-glucopyranosyl esters of 3 β ,23-dihydroxylup-20(29)-en-28-oicacid3-O- 13- β- -D- glucopyranoside(1), hederagenin3-O- β -D-glucopyranoside(2), 3 β -hydroxyolean-9(11), 12-dien-28-oic acid 3-O-β -D-glucopyranoside(3), 3 α-hydroxyolean- 12-en-23,28-dioic acid(4), respectively.