Phytoecdysteroids of plants of the genus Silene. XVII. Ecdysterone 22,25-di-O-benzoate from Silene scabrifolia

The new phytoecdysteroid ecdysterone 22,25-di-O-benzoate (IV) has been isolated from the epigeal organs ofSilene scabrifolia Kom. The alkaline hydrolysis of (IV) gave ecdysterone 25-O-benzoate and ecdysterone (I). Details of the IR, UV, mass, PMR, and¹³C NMR spectra of compound (IV) are given.Institute of the Chemistry of Plant Substances, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 363–366, May–June, 1990.