title: Triterpenoid saponins from the stem bark of Acanthopanax brachypus HARMS.
abstract: Two new triterpenoid saponins, brachyposide A (1) {3-O-beta-D-galactopyranosyl-(1-->2)-[beta-D-xylopyranosyl-(1-->3)]-beta-D-glucuronopyranosyl-2beta,3beta,16alpha,23-tetrahydroxyolean-12-en-28-oic acid 28-O-beta-D-apiofuranosyl-(1-->3)-beta-D-xylopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl-(1-->2)-alpha-L-arabinopyranosyl ester} and brachyposide B (2) {3-O-beta-D-glucopyranosyl-(1-->3)-beta-D-galactopyranosyl-(1-->3)-beta-D-glucuronopyranosyl-2beta,3beta,23-trihydroxyolean-12-en-28-oic acid 28-O-beta-D-xylopyranosyl-(1-->4)-[beta-D-apiofuranosyl-(1-->3)]-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranosyl ester}, together with four known triterpenoid saponins, including tabguticoside A, nipponoside D, palmatoside E and ciwujianoside A(1), were isolated from the stem bark of Acanthopanax brachypus. Their structures were elucidated on the basis of spectroscopic and chemical evidence.
authors.affiliation: College of Chemistry and Chemical Engineering, Longdong University, China. hhb-88@126.com
authors.forename: Hao-Bin
authors.initials: HB
authors.lastname: Hu
authors.forename: Xu-Dong
authors.initials: XD
authors.lastname: Zheng
authors.forename: Hong
authors.initials: H
authors.lastname: Cao
authors.forename: Xiao-Qiang
authors.initials: XQ
authors.lastname: Guo
authors.forename: Huai-Sheng
authors.initials: HS
authors.lastname: Hu
mesh_terms: D028001:Eleutherococcus / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D018547:Plant Stems / Q000737:chemistry; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D012503:Saponins; D014315:Triterpenes; C545020:brachyposide A; C545019:brachyposide B