title: Two new steroidal saponins from the rhizome of Polygonatum sibiricum.
abstract: Two new furostanol saponins, polygonoides A (1) and B (2), along with three known compounds, were obtained from the ethanolic extract of the rhizome of Polygonatum sibiricum Redoute. On the basis of acid hydrolysis and comprehensive spectroscopic analyses, the structures of polygonoides A and B were elucidated as (25R)-26-O-beta-D-glucopyranosyl-furost-5,22(23)-dien-3beta,26-diol-3-O-alpha-L-rhamnopyranosyl-(1 --> 3)-beta-D-glucopyranosyl-(1 --> 4)-[alpha-L-rhamnopyranosyl-(1 --> 2)]-beta-D-glucopyranoside (1) and 22 alpha-(propionyloxy)-furost-5-en-3beta,20 alpha-diol-3-O-beta-D-glucopyranosyl-(1 --> 4)-[alpha-L-rhamnopyranosyl-(1 --> 2)]-beta-D-glucopyranoside (2).
authors.affiliation: School of Food Science and Technology, Research Center of Natural Products, Jiangnan University, Wuxi, China. xdp1219@yahoo.com.cn
authors.forename: De-Ping
authors.initials: DP
authors.lastname: Xu
authors.forename: Chang-Ying
authors.initials: CY
authors.lastname: Hu
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010840:Phytosterols / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D031384:Polygonatum / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013237:Stereoisomerism
chemical_list: D004365:Drugs, Chinese Herbal; D010840:Phytosterols; D012503:Saponins; C539205:polygonoide A; C539206:polygonoide B