Abstract
glycosides, of which the more polar one greatly predominated, and also trace amounts of still more polar glycosides. The isolation of the main steroid glycoside (SG) was achieved by defardng the carefully ground seeds with hexane, followed by exlraction with 80% isopropyl alcohol. Evaporation of the alcoholic extract gave a 20% total yield of unpurified glycosides. Crystallization of this mixture from ethanol enabled the main glycoside to be obtained in the practically pure state with a yield of I0%, and two recrystaUizations of this permitted the complete elimination of a contaminating weakly polar glycoside. By TLC, in a complete acid hydrolysate of the SG we identified glucose, galactose, and an aglycon close in chromatographic mobility to authentic specimens of smilagenin and tigogenin. The further determination of the structure of the SG was made with the use of IH and t3C NMR spectroscopy.
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