TRITERPENE GLYCOSIDES OF Astragalus AND THEIR GENINS. LIV. ASKENDOSIDE G FROM Astragalus taschkendicus

摘要

Continuing investigations of the cycloartane methylsteroids of plants of the Astragalus genus (Leguminosae), we have. isolated from the roots of Astragalus taschkendicus yet another new glycoside, which we have called askendoside G(l). The determination of the structure of this glycoside is described in the present paper. The results of a consideration of the *H NMR spectrum of the glycoside under study (1), which contained one-proton doublets of an AS system at 0.15 and 0.38 ppm, and also the presence of the signals of seven methyl groups in the high field, permitted us to assign askendoside G to the triterpene glycosides of the cycloartane series [1,2].