Two new spirostanol saponins from Allium tuberosum.
Two new spirostanol saponins, tuberosides D and E, have been isolated from the seeds of Allium tuberosum. On the basis of spectral data and chemical reactions, their structures were established as (25S)-5alpha-spirostane-2alpha,3beta-diol 3-O-alpha-L-rhamnopyranosyl-(1-->2)-O-[alpha-L-rhamnopyranosyl-(1-->4 )]-O-beta-D-glucopyranoside and (25S)-5alpha-spirostan-2alpha, 3beta-diol 3-O-beta-D-glucopyranosyl-(1-->2)-O-[alpha-L-rhamnopyranosyl-(1-->4)] -O-beta-D-glucopyranoside, respectively.
Sang
S
S
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, People's Republic of China.
Lao
A
A
Wang
H
H
Chen
Z
Z
D000490:Allium / Q000737:chemistry*; D002240:Carbohydrate Sequence; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D012639:Seeds / Q000737:chemistry; D013150:Spirostans / Q000737:chemistry* / Q000302:isolation & purification
D006027:Glycosides; D013150:Spirostans; C121577:tuberoside D; C121578:tuberoside E