Die Glykoside der Wurzeln von Kanahia laniflora (FORSSK.) R. BR. 1. Mitteilung: Isolierungen. Glykoside und Aglykone, 299. Mitteilung

The roots of Kanahia laniflora (F ORSSK .) R. B R . contain, in addition to small quantities of cardenolides, a large amount of ester glycosides which are difficulty separable from one another. However, two of these ester glycosides were obtained in a nearly pure form. The crude mixture of ester glycosides, after mild acidic hydrolysis, gave a mixture of acyl‐genins and three sugars: D ‐oleandrose, D ‐digitoxose and D‐canarose, all of which were obtained in crystalline form. Acetic acid, benzoic acid and another unidentified acid were obtained on alkaline hydrolysis of the mixture of acyl‐genins along with 17‐isolineolon, lineolon, deacetylmetaplexigenin and a small amount of sarcostin‐ketone. Besides these known genins, three probably new genins (α, τ, λ) were obtained in small, but crystalline amounts.