| Literature DB >> 20060986 |
Emre Polat1, Erdal Bedir, Angela Perrone, Sonia Piacente, Ozgen Alankus-Caliskan.
Abstract
Three cycloartane-type triterpene glycosides were isolated from Astragalus wiedemannianus together with eight known secondary metabolites namely cycloastragenol, cycloascauloside B, astragaloside IV, astragaloside VIII, brachyoside B, astragaloside II, astrachrysoside A, and astrasieversianin X. The structures were established mainly by a combination of 1D and 2D-NMR techniques as 3-O-[alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranosyl]-25-O-beta-D-glucopyranosyl-20(R),24(S)-epoxy-3beta,6alpha,16beta,25-tetrahydroxycycloartane, 3-O-[alpha-L-rhamnopyranosyl-(1-->2)-beta-D-xylopyranosyl]-6-O-beta-D-glucopyranosyl-24-O-alpha-(4'-O-acetoxy)-L-arabinopyranosyl-16-O-acetoxy-3beta,6alpha,16beta,24(S),25-pentahydroxycycloartane, 3-O-[alpha-L-rhamnopyranosyl-(1-->2)-beta-D-xylopyranosyl]-6-O-beta-D-glucopyranosyl-24-O-alpha-L-arabinopyranosyl-16-O-acetoxy-3beta,6alpha,16beta,24(S),25-pentahydroxycycloartane. To the best of our knowledge, the presence of an arabinose moiety on the acyclic side chain of cycloartanes is reported for the first time. Copyright 2009 Elsevier Ltd. All rights reserved.Entities:
Mesh：
Substances：
Year: 2010 PMID： 20060986 DOI： 10.1016/j.phytochem.2009.11.013
Source DB: PubMed Journal: Phytochemistry ISSN： 0031-9422 Impact factor: 4.072