Steroid saponins and sapogenins of Allium IV. Karatavigenin — A new sapogenin from Allium karataviense

Summary For all the bisbenzyltetrahydroisoquinoline alkaloids considered except thalisopine, positive CEs are found in the case of the SS configuration and negative CEs in the case of the RS configuration.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 705–708, November–December, 1970.