Studies on the Medicinal Resources. XII

Components of the Leaves of Cornus controversa HEMSL., Ailanthus altissima SWINGL, and Ricinus communis L

Abstract

Extraction of the fresh leaves of Cornus controversa HEMSL and of Ailanthtus altissima SWINGL with methanol afforded pale yellow microneedles, m.p. 225-226° and m.p. 230°, respectively in 0.4% and 0.2% yield. The two were found to be one and the same isoquercitrin (quercetin 3-glucoside). Pale yellow microneedles, m.p. 180-181°, were obtained in 0.2% yield from the leaves of Ricinus communis L. and the substance was proved to be rutin.