| Abstract
| - Four novel cycloartane-type triterpene glycosides,macrophyllosaponins A−D (1−4)wereisolated from the roots of Astragalus oleifolius. Bymeans of chemical (acetylation, alkalinehydrolysis) and spectroscopic methods (IR, 1D- and 2D-NMR, FABMS),their structures wereestablished as3-O-α-l-rhamnopyranosyl-24-O-(4‘‘-O-acetyl)-β-d-xylopyranosyl-1α,3β,7β,24(S),25-pentahydroxycycloartane (1),3-O-α-l-rhamnopyranosyl-24-O-β-d-xylopyranosyl-1α,3β,7β,24(S),25-pentahydroxycycloartane (2),3-O-α-l-rhamnopyranosyl-25-O-β-d-glucoyranosyl-1α,3β,7β,24(S),25-pentahydroxycycloartane(3), and3-O-α-l-rhamnopyranosyl-24-O-(2-O-β-d-xylopyranosyl)-β-d-xylopyranosyl-1α,3β,7β,24(S),25-pentahydroxycycloartane(4).
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