title: Three new steroidal saponins from the rhizome of Paris polyphylla.
abstract: A mixture of a pair of stereoisomeric new spirostanol saponins (1a and 1b) and a new cholestane saponin (2) were isolated from the rhizome of Paris pollyphylla Smith var. yunnanensis. Their structures were elucidated as (25R)-spirost-5-en-3beta, 7beta-diol-3-O-alpha-L-arabinofuranosyl-(1 --> 4)-[alpha-L-rhamnopyranosyl-(1 --> 2)]-beta-D-glucopyranoside (1a), (25R)-spirost-5-en-3beta, 7alpha-diol-3-O-alpha-L-arabinofuranosyl-(1 --> 4)-[alpha-L-rhamnopyranosyl-(1 --> 2)]-beta-D-glucopyranoside (1b) and 26-O-beta-D-glucopyranosyl-(25R)-Delta(5(6), 17(20))-dien-16, 22-dione-cholestan-3beta, 26-diol-3-O-alpha-L-arabinofuranosyl-(1 --> 4)-[alpha-L-rhamnopyranosyl-(1 --> 2)]-beta-D-glucopyranoside (2) by a combination of HR-ESI-MS, FAB-MS, 1D and 2D NMR techniques (including (1)H-NMR, (13)C-NMR, (1)H--(1)H COSY, HSQC, HMBC and NOESY).
authors.affiliation: Beijing Institute of Radiation Medicine, Beijing 100850, People's Republic of China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhao
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Kang
authors.forename: Yi-Xun
authors.initials: YX
authors.lastname: Liu
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhao
authors.forename: Cheng-Qi
authors.initials: CQ
authors.lastname: Xiong
authors.forename: Bai-Ping
authors.initials: BP
authors.lastname: Ma
authors.forename: Fang-Ting
authors.initials: FT
authors.lastname: Dong
mesh_terms: D002851:Chromatography, High Pressure Liquid; D007202:Indicators and Reagents; D019668:Liliaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D018517:Plant Roots / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D013256:Steroids / Q000737:chemistry*
chemical_list: D007202:Indicators and Reagents; D012503:Saponins; D013256:Steroids