Three new cycloartane glycosides, trigonoside I, II and III, and the k
nown astragalosides I and II were isolated from the roots of Astragalu
s trigonus. The structures of the new glycosides were totally elucidat
ed by high held (600 MHz) NMR analyses as cycloastragenol-6-O-beta-xyl
opyranoside, cycloastragenol-3-O-[alpha-L-arabinopyranosyl(1 --> 2)-be
ta-n-xylopyranosyl]-6-O-beta-D-xylopyranoside and cycloastragenol-3-O-
[alpha-L-arabinopyranos(1 --> -acetyl)-xylopyranosyl]-6-O-beta-D-xylop
yranoside.