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Schröder R, Nowak P, Nielsen H. "Method for the Synthesis of 4-({[(4-chlorophenyl)methyl]amino}methylidene)-3-methyl-4,5-dihydro-1H-pyrazol-5-one" [P]. European Patent, EP 3623419 A1, 2017-03-02.
发明人刘建华,黄志刚,韩伟. "A Process for Preparing High-Purity 4-({[(4-chlorophenyl)methyl]amino}methylidene)-3-methyl-4,5-dihydro-1H-pyrazol-5-one" [P]. 中国发明专利, 专利号 CN 111016291 A, 授权公告日 2017-04-19.
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