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Cycloartane triterpene glycosides from Astragalus trigonus |
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| Authors: | Pierluigi Gariboldi Francesca Pelizzoni Marco Tat Luisella Verotta Nadia El-Sebakhy Aya M Asaad Rokia M Abdallah Soad M Toaima |
| Institution: | a Dipartimento di Scienze Chimiche, Università di Camerino, via S. Agostino 1, 62032, Camerino (MC), Italy b Dipartimento di Chimica Organica e Industriale, Università di Milano, via Venezian 21, 20133, Milano, Italy c PHARMACIA Biopharmaceuticals-Bioscience Centre/Structural Biochemistry, via Giovanni XIII 23, 20014, Nerviano (MI), Italy d Faculty of Pharmacy, University of Alexandria, Alexandria, Egypt |
| Abstract: | Three new cycloartane glycosides, trigonoside I, II and III, and the known astragalosides I and II were isolated from the roots of Astragalus trigonus. The structures of the new glycosides were totally elucidated by high field (600 MHz) NMR analyses as cycloastragenol-6-O-β-xylopyranoside, cycloastragenol-3-O- -l-arabinopyranosyl(1 → 2)-β-d-xylopyranosyl]-6-O-β- d-xylopyranoside and cycloastragenol-3-O--l-arabinopyranosyl(1 → 2)-β-d-(3-O-acetyl)-xylopyranosyl]-6-O-β-d-xylopyranoside. |
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