FIELD: medicine.
SUBSTANCE: berry waste - pressed skins of black chokeberry Aronia Melanocarpa - are extracted with isopropyl alcohol at room temperature followed with release of end product by concentration to 1/8-1/10 volumes and cooling of isopropanol extract, separation of deposited paste, processed by caustic potash solution in isopropyl alcohol, with following acidation of filtered solution with diluted hydrochloric acid to pH 6-7.
EFFECT: method is producible, fire-safe and cost-effective.
1 tbl, 5 ex
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