Cycloascauloside a from Astragalus caucasicus leaves

The new cycloartane glycoside cycloascauloside A with the structure 20S,24R-epoxycycloartan-3β, 6α,16β,25-tetraol 3-O-α-L-rhamnopyranosyl(1→6)]-β-D-(2′-O-acetyl)-glucopyranoside was isolated from leaves of Astragalus caucasicus Pall. The structure was established based on IR, PMR, and ¹³C NMR spectra and physicochemical properties of the compound itself and the products of its chemical transformations. __________ Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 359–361, July–August, 2006.