桑白皮の成分 (第二報)

抄録

The alcoholic extract of mulberry bark, from which the precipitate has been removed, was concentrated under vacuum and put to water distillation and obtained volatile oil (ca 0.07% of the material).
The non-volatile portion was dissolved in ether and shaken with 5% Na₂CO₃ and then with 2% KOH solutions. KOH solution contained a substance believed to be resinotannol. From the portion existing between ether and alkaline layers, sitosterol-d-glucoside was obtained. Ether soluble portion was saponified with alcoholic potash and α-amyrin, sitosterol and pale yellow powder (probably resen of Tschirch's) were obtained from the neutral portion. Acid portion yielded palmitic and stearic acids.