FIELD: chemical-pharmaceutical industry, pharmaceutical technology.
SUBSTANCE: method involves extraction of mixture of lichens of genus Usnea and Cladonia with organic solvent (chloroform, carbon tetrachloride, hexane, petroleum ether, nefras and mixture of above enumerated solvents) followed by isolation of the end product by evaporation of organic solvent and precipitation from extract in system chloroform-alcohol (1:10) or from hexane. Invention provides increasing the yield of product up to 0.99-2.44%.
EFFECT: improved preparing method.
7 ex
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