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  • Title: Two new steroidal saponins from the seeds of Allium cepa L.
    Author: Yuan L, Ji TF, Li CJ, Wang AG, Yang JB, Su YL.
    Journal: J Asian Nat Prod Res; 2009; 11(3):213-8. PubMed ID: 19408144.
    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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