Two new steroidal saponins from the seeds of Allium cepa L.
Two new steroidal saponins, ceparosides C (1) and D (2), have been isolated from the seeds of Allium cepa L. Their structures have been established as 26-O-(beta-D-glucopyranosyl)-(25R)-furost-5,20(22)-dien-3beta,26-diol-3-O-beta-D-glucopyranosyl-(1 --> 4)-[alpha-l-rhamnopyranosyl (1 --> 2)]-beta-D-galactopyranoside (1) and 26-O-(beta-D-glucopyranosyl)-(25S)-furost-5,20(22)-dien-3beta, 26-diol-3-O-beta-D-glucopyranosyl-(1 --> 4)-[alpha-L-rhamnopyranosyl(1 --> 2)]-beta-D-galactopyranoside (2) by means of spectral and chemical methods.
Yuan
Ling
L
Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Ji
Teng-Fei
TF
Li
Chuang-Jun
CJ
Wang
Ai-Guo
AG
Yang
Jian-Bo
JB
Su
Ya-Lun
YL
D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D019697:Onions / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D012639:Seeds / Q000737:chemistry; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*
D004365:Drugs, Chinese Herbal; D012503:Saponins; D013256:Steroids; C540728:ceparoside C; C540729:ceparoside D