FIELD: medicine.
SUBSTANCE: invention refers to production of medicinal, veterinary, cosmetic preparations, and also to food industry and agriculture. Ground pine bark is extracted with boiling 10-15% ethanol within 0.5-1.0 hours at water duty 1:10-15. The water-alcohol solution is separated from bark, concentrated to 1/4 of original volume, saturated with sodium chloride with filtering separation of made deposit. Filtrate is three-fold extracted with ethyl acetate, and ethyl acetate solution is vacuum concentrated to 1/5 of original volume. The concentrated ethyl acetate solution is 5-7-fold dissolved with chloroform with recovering proanthocyanidines.
EFFECT: higher yield of proanthocyanidines.
3 ex
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