Steroid sapogenins ofDigitalis ciliata Trautv
SummaryTigogenin and gitogenin have been isolated from the leaves and flowers, and digitogenin (0.283%) and tigogenin (0.062%) from the seeds ofD. ciliata Trautv. The presence of gitogenin in the seeds has also been established by paper chromatography.
A preliminary phytochemical investigation of Digitalis ferruginea.
The cardiac glycosides of the fresh first-year leaves of Digitalis ferruginea have been resolved into alpha acetyl digitoxin and an amorphous glycoside whose properties resemble digitoxin. The saponin tigonin was also very readily isolated in the amount of about two per cent of the dry weight of the leaves.
Separation of Saponins by Paper Chromatography
IN the course of a study on the composition of saponins from Indian raw materials, difficulties were encountered in the complete separation of the glycosides in pure form by chemical means. The usual method of repeated precipitation with solvents is not dependable and does not ensure the chemical purity of the separated products, the more so because many of the saponins are hygroscopic.