Two new steroidal saponins from the seeds of Allium cepa L

  • J Asian Nat Prod Res. 2009;11(3):213-8. doi: 10.1080/10286020802696411.
Ling Yuan  1 ,  Teng-Fei Ji ,  Chuang-Jun Li ,  Ai-Guo Wang ,  Jian-Bo Yang ,  Ya-Lun Su
Affiliations
  • 1. 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.
PMID: 19408144 DOI: 10.1080/10286020802696411
Abstract

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.

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