Studies on the Constituents of Digitalis purpurea L. XVII. Isolation of Several New Glycosides from Fraction PGB of Digitalis Seeds.

Abstract

Several new glycosides were isolated from digitalis seeds, four substances, B-I", A-III', C-0, and X₂, were obtained as crystals, and five substances, PGA, A-II', B-I', PGB, and A-III, were obtained as a colorless powder. In accordance with their coloration, it was assumed that substances B-0, PGA, B-I', and C-0 belong to the digitoxigenin series, and substances A-II', A-II, PGB, A-III, and A-III'to the gitoxigenin series.