Two new acylated tridesmosidic saponins from Astragalus armatus

Nabil Semmar, Tomofumi Miyamoto, Yassine Mrabet, Marie Aleth Lacaille-Dubois

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13 Citations (Scopus)


Two new tridesmosidic glycosides of (3β,6α,16β,20R,24S)-20, 24epoxycycloartane-3,6,16,25-tetrol (=cycloastragenol), armatosides I and II (1 and 2, resp.), were isolated from the roots of Astragalus armatus (Fabaceae) as well as the known bidesmosidic glycosides of cycloastragenol, trigonoside II (3) and trojanoside H (4). Their structures were elucidated as (3β,6α, 16β,20R,24S)-3-O-(2,3-di-O-acetyl-β-D-xylopyranosyl)-20, 24-epoxy-25-O-β-D-glucopyranosyl-6-O-β-D-xylopyranosylcycloartane-3,6, 16,25-tetrol (2). These structures were established by extensive NMR and MS analyses and by comparison with literature data.

Original languageEnglish
Pages (from-to)870-876
Number of pages7
JournalHelvetica Chimica Acta
Issue number5
Publication statusPublished - Jan 1 2010

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Biochemistry
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


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