Three new saponins from the fresh rhizomes of Polygonatum kingianum.
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.
Yu
He-Shui
HS
Beijing Institute of Radiation Medicine, Beijing, People's Republic of China.
Zhang
Jie
J
Kang
Li-Ping
LP
Han
Li-Feng
LF
Zou
Peng
P
Zhao
Yang
Y
Xiong
Cheng-Qi
CQ
Tan
Da-Wei
DW
Song
Xin-Bo
XB
Yu
Kate
K
Ma
Bai-Ping
BP
D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D031384:Polygonatum / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D013237:Stereoisomerism
D012503:Saponins