Hydrolysis of 6.00 g diosmin obtained above in 400 ml sulfuric acid solution-water – acetic acid (2-65-38 percentage by volume). Boiled salmon mixture in 8 hours. The reaction temperature is maintained at 90 -100 C. Then filter the mixture hot, room filter is cooled to 0 C. To quiet down, solid for the filter under the pressure from poor to obtain the product. The product was crystallized in the mixture acetone and methanol, gained 1.53 g product, the performance response ...%.
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