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 held (600 MHz) NMR analyses as cycloastragenol-6-O-beta-xylopyranoside, cycloastragenol-3-O-[alpha-L-arabinopyranosyl(1 --> 2)-beta-n-xylopyranosyl]-6-O-beta-D-xylopyranoside and cycloastragenol-3-O-[alpha-L-arabinopyranos(1 --> 2)-beta-D-(3-O-acetyl)-xylopyranosyl]-6-O-beta-D-xylopyranoside.
Cycloartane triterpene glycosides from Astragalus trigonus / P. Gariboldi, F. Pelizzoni, M. Tatò, L. Verotta, N. El-Sebakhy, A.M. Asaad, R.M. Abdallah, S.M. Toaima. - In: PHYTOCHEMISTRY. - ISSN 0031-9422. - 40:6(1995), pp. 1755-1760.
Cycloartane triterpene glycosides from Astragalus trigonus
F. PelizzoniSecondo
;L. Verotta;
1995
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 held (600 MHz) NMR analyses as cycloastragenol-6-O-beta-xylopyranoside, cycloastragenol-3-O-[alpha-L-arabinopyranosyl(1 --> 2)-beta-n-xylopyranosyl]-6-O-beta-D-xylopyranoside and cycloastragenol-3-O-[alpha-L-arabinopyranos(1 --> 2)-beta-D-(3-O-acetyl)-xylopyranosyl]-6-O-beta-D-xylopyranoside.
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