We have previously reported the isolation of carbohydrates, alcohols, and acids from E. lamprocarpa Benth. [1].In this paper we give the results of a study of the triterpene compounds from E. jaxartica I)rokh.The eomminuted raw material was extracted with chloroform. The chloroform was distilled off and the residue was dissolved in acetone. The aeetone-spluble fraction was treated with petroleum ether and chromatographed on alumina. Elution was then carried out successively with petroleum ether, benzene, acetone, and methanol. A mixture with an authentic sample of euphol gave no depression of the melting point and their IR spectra were identical.The second ethereal eluate and the acetone eluate yielded crystals with the composition C~lH~zO , mp 126-127 ° C, [oz]~ ±0% The substance formed anO-acetyl derivative with mp 126 ° C. The properties of this substance were identical with those of euphorbol, also isolated from spurge [4]. A mixture of the substance that we had obtained with euphorbol gave no depression of the melting point, and their IR spectra were identical.

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We have investigated the epigeal part of Chamesyce canescens, family Euphorbiaceae, collected in full-flowering period in the Tashkent oblast. The eomminuted plant material was extracted with chloroform. The yield of extractive substances was 5.99%, of which the acetone-soluble fraction amounted to 4.46% and the insoluble fraction to 1.53%. The acetone-insoluble fraction was heated with petroleum ether (bp 40-70°C). The fraction soluble in petroleum ether was passed through a column filled with alumina (length of the column 70 cm, diameter 3.4 cm). The column was eluted successively with petroleum ether, benzene, diethyl ether, acetone, and methanol.

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