The invention provides a preparation method for a vilazodone monoxide impurity 1-(2-formamyl benzofuran-5-group)-4-(4-(5-cyan-1H-benzpyrole-3-group) butyl) piperazine-4-oxide. The preparation method is capable of supplying basis for qualitative and quantitative analysis for the impurities in a drug, has significance in compounding high-quality vilazodone hydrochloride and can effectively guarantee the safe medication for patients.
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Paragraph 0011
(2017/08/29)
VILAZODONE IMPURITIES, PROCESS FOR THEIR PREPARATION, AND THEIR USE AS REFERENCE STANDARDS
The present invention relates to isolated vilazodone N-oxide and oxo vilazodone impurities, processes for their preparation, and their use as reference standards in a chromatographic method for testing the purity of a vilazodone active pharmaceutical ingredient or dosage form.
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Page/Page column 12
(2014/11/13)
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