Preparation method of high-purity distigmine bromide
The invention relates to a preparation method of high-purity distigmine bromide and aims to provide a method being economical, environmentally friendly, convenient to operate and suitable for large-scale industrial production for synthesizing high-purity and high-yield distigmine bromide. In the synthesis method, the volume ratio of acetonitrile to acetone for refining distigmine bromide is (20-50): 1, preferably (25-30): 1.
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Paragraph 0007; 0026; 0027
(2018/04/28)
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