title: Three new saponins from the fresh rhizomes of Polygonatum kingianum.
abstract: Further studies on the fresh rhizomes of Polygonatum kingianum led to the isolation of one new spirostanol saponin (25R)-kingianoside G (1), and two pairs mixture of 25R and 25S stereoisomeric spirostanol saponins (25R, S)-pratioside D1 (2a, 2b) and (25R, S)-kingianoside A (3a, 3b), among them 2b and 3b were new spirostanol saponins, together with another two known compounds, disporopsin (4) and daucosterol (5). The structures of the new saponins were determined by detailed analysis of their 1D and 2D NMR spectra, and chemical evidences.
authors.affiliation: Beijing Institute of Radiation Medicine, Beijing, People's Republic of China.
authors.forename: He-Shui
authors.initials: HS
authors.lastname: Yu
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Kang
authors.forename: Li-Feng
authors.initials: LF
authors.lastname: Han
authors.forename: Peng
authors.initials: P
authors.lastname: Zou
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhao
authors.forename: Cheng-Qi
authors.initials: CQ
authors.lastname: Xiong
authors.forename: Da-Wei
authors.initials: DW
authors.lastname: Tan
authors.forename: Xin-Bo
authors.initials: XB
authors.lastname: Song
authors.forename: Kate
authors.initials: K
authors.lastname: Yu
authors.forename: Bai-Ping
authors.initials: BP
authors.lastname: Ma
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D031384:Polygonatum / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D013237:Stereoisomerism
chemical_list: D012503:Saponins