TRITERPENE GLYCOSIDES FROM Cussonia paniculate.II.ACETYLATED GLYCOSIDES FROM LEAVES

摘要

Structures of 13 new acetylated triterpene glycosides from leaves of Cussonia paniculata (Araliaceae) were established as 28-O-(2-O-acetyl- and 3-O-acetyl-alpha-L-rhamnopyranosyl)-(1->4)-O-beta-D-glucopyranosyl-(1->6)-O-beta-D-glucopyranosides of 23-hydroxybetulinic acid (1a and 1b) and hederagenin (2a and 2b),3-O-alpha-L-arabinopyranosyl-28-O-(2-O-acetyl- and 3-O-acetyl-alpha-L-rhamnopyranosyl)-(1->4)-O-beta-D-glucopyranosyl-(1->6)-O-beta-D-glycopyranosides of oleanic (3a and 3b) and ursolic(3c and 3d) acids,3-O-alpha-L-arabinopyranosyl-28-O-(4-O-acetyl-,2-O-acetyl-,and 3-O-acetyl-alpha-L-rhamnopyranosyl)-(->4)-O-beta-D-glucopyranosyl-(1->6)-O-beta-D-glucopyranosides of hederagenin (4,5a and 5b),and 3-O-beta-D-glucopyranosyl-(1->2)-O-alpha-L-arabinopyranosyl-28-O-(2-O-acetyl-and3-O-acetyl-alpha-L-rhamnopyranosyl)-(1->4)-O-beta-D-glucopyranosyl-(1->6)-O-beta-D-glucopyranosides of oleanic acid (6a and 6b).The structures of the compounds were established using chemical methods and NMR spectroscopy.