Furostanol oligoglycosides from Asparagus cochinchinensis.
Three new furostanol oligoglycosides, named aspacochioside A (1), B (2) and C (3), together with the known compound 3-O-[(alpha-L-rhamnopyranosyl-(1 --> 4))(beta-D-glucopyranosyl)]-26-O[beta-D-glucopyranosyl]-(25S)-5beta-spirostane-3beta-ol were isolated from the roots of Asparagus cochinchinensis. Their structures were elucidated by spectroscopic techniques (IR, HR-ESIMS, ESIMS/MS, ID and 2D NMR) and chemical methods as 3-O-[(alpha-L-rhamnopyranosyl-(1 --> 4))(beta-D-glucopyranosyl)]-26-O-[beta-D-glucopyranosyl]-(25S)-5beta-furostane-3beta,22alpha,26-triol (1), 3-O-[(alpha-L-rhamnopyranosyl-(1 --> 4))(beta-D-glucopyranosyl)]-26-O-[beta-D-glucopyranosyl]-22alpha-methoxy-(25S)-5beta-furostane-3beta,26-diol (2), and 3-O-[(alpha-L-rhamnopyranosyl-(1 --> 4))(beta-D-glucopyranosyl)]-26-O-[beta-D-glucopyranosyl]-(25S)-5beta-furost-20(22)-en-3beta,26-diol (3).
Shi
Jian-Gong
JG
Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Bejing 100050, China. shijg@imm.ac.cn
Li
Guo-Qiang
GQ
Huang
Sheng-Yang
SY
Mo
Shun-Yan
SY
Wang
Yan
Y
Yang
Yong-Chun
YC
Hu
Wen-Yan
WY
D027761:Asparagus Plant / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods
D006027:Glycosides