title: Two new triterpenoid saponins from Pulsatilla cernua (Thunb.) Bercht. et Opiz.
abstract: Two new triterpenoid saponins, named cernuaside C and D, have been isolated from Pulsatilla cernua (Thunb.) Bercht. et Opiz. The structures of the two new triterpenoid saponins were elucidated as 3-O-beta-D-xylopyranosyl(1 --> 2)-[alpha-L-rhamnopyranosyl(1 --> 3)]-alpha-L-arabinopyranosyl oleanolic acid 28-alpha-L-rhamnopyranosyl(1 --> 4)-beta-D-glucopyranosyl(1 --> 6)-beta-D-glucopyranoside. (1) and 3-O-alpha-L-arabinopyranosyl (1 --> 3)-alpha-L-rhamnopyranosyl(1 --> 2)-alpha-L-arabinopyranosyl oleanolic acid 28-O-beta-D-glucopyranoside (2) by 1D, 2D-NMR techniques, ESI-MS analysis as well as chemical methods.
authors.affiliation: Department of Traditional Chinese Medicine Chemistry, School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China.
authors.forename: Tun-Hai
authors.initials: TH
authors.lastname: Xu
authors.forename: Ya-Juan
authors.initials: YJ
authors.lastname: Xu
authors.forename: Hong-Xun
authors.initials: HX
authors.lastname: Li
authors.forename: Dong
authors.initials: D
authors.lastname: Han
authors.forename: Hong-Feng
authors.initials: HF
authors.lastname: Zhao
authors.forename: Sheng-Xu
authors.initials: SX
authors.lastname: Xie
authors.forename: Yu
authors.initials: Y
authors.lastname: Li
authors.forename: Jian-Zhao
authors.initials: JZ
authors.lastname: Niu
authors.forename: Yun-Shan
authors.initials: YS
authors.lastname: Si
authors.forename: Dong-Ming
authors.initials: DM
authors.lastname: Xu
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D031946:Pulsatilla / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D021241:Spectrometry, Mass, Electrospray Ionization; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D012503:Saponins; D014315:Triterpenes