Triterpene glycosides from Tetrapanax papyriferum. III. minor monodesmoside glycosides from stem bark

摘要

Minor monodesmoside triterpene glycoside St-A, St-B, St-C_1, St-D_1, St-C_2, and St-D_2 were isolated from stem bark of Tetrapanax papyriferum C.Koch (Araliaceae). The structures of oleanolic and echinocystic acid 3-O-alpha-L-arabinopyranosides, oleanolic and echinocystic acid 3-O-beta-D-glucopyranosyl-(1->3)-O-alpha-L-arabinopyranosides, and oleanolic and echinocystic acid 3-O-beta-D-galactopyranosyl-(1->2)-O-alpha-L-arabinopyranosides, respectively, were proposed. Glycosides St-C_2, St-D_1, and St-D_2 are new triterpene glycosides. The structure of the isolated compounds were established using chemical methods and NMR spectroscopy.