抄録
The structure of substance A-VI, isolated by the writers and described in Part X, 1) was examined. This substance did not crystallize, but its acetate was obtained as needles, m. p. 237∼239°. By acid hydrolysis, it afforded dianhydrogitoxigenin, digitalose, and glucose. Its treatment with activated alumina and deacetylation with potassium hydrogencarbonate changed its acetate into 16-anhydro-digitalinum verum monoacetate. There-fore substance A-VI is formulated as 16ξ, 17α-gitoxigenin glucosidodigitaloside and it was named allo-digitalinum verum.
