Abstract
The structures of 6 new oleanene glycosides (1—6) isolated from the leaves of Acanthopanax japonicus FRANCH et. SAVART (Araliaceae) were elucidated by mass, 1D, and 2D NMR spectroscopy. The structures of 1—6 were established as 28-O-[α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl] ester of 3β,23-dihydroxy-olean-12-en-28,29-dioic acid, 3β,30-dihydroxy-olean-12-en-23,28-dioic acid, 3β,29-dihydroxy-olean-12-en-23,28-dioic acid (=dianic aicd), 3β-dihydroxy-olean-12-en-23,28-dioic acid (=gypsogenic acid), 3β,29-dihydroxy-23-oxo-olean-12-en-28-oic acid, and 3β-hydroxy-23-oxo-olean-12-en-28,29-dioic acid, designated acanjaposide D (1), E (2), F (3), G (4), H (5), and I (6), respectively.
