title: Triterpenoid saponins from the rhizome of Polygonatum sibiricum.
abstract: Three new triterpenoid saponins, polygonoides C (1), D (2), and E (3), were obtained from the ethanolic extract of the rhizome of Polygonatum sibiricum Redoute. On the basis of NMR and ESI-MS spectra, and chemical evidence, the structures of the three new compounds were elucidated as 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)-β-D-glucopyranosyl-3β,7β,22β-trihydroxy-oleanolic acid (1), 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)-β-D-glucopyranosyl-3β,7β,22β-trihydroxy-oleanolic acid methyl ester (2), and 3-O-β-D-glucopyranosyl-(1→3)-β-D-glucopyranosyl-(1→4)-[α-L-rhamno-pyranosyl-(1→2)]-β-D-glucopyranosyl-3β,21β-dihydroxy-oleanolic acid 28-O-β-D-glucopyranosyl-(1→3)-β-D-glucopyranosyl-(1→3)-β-D-glucopyranoside (3).
authors.affiliation: Department of Food Science and Engineering, Jinan University, Guangzhou, China. hucy0000@sina.com
authors.forename: Chang-Ying
authors.initials: CY
authors.lastname: Hu
authors.forename: De-Ping
authors.initials: DP
authors.lastname: Xu
authors.forename: Yu-Mei
authors.initials: YM
authors.lastname: Wu
authors.forename: Shi-Yi
authors.initials: SY
authors.lastname: Ou
mesh_terms: D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D031384:Polygonatum / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D012503:Saponins; D014315:Triterpenes; C552793:polygonoide C; C552794:polygonoide D; C552792:polygonoide E; D009828:Oleanolic Acid