Fischer A B, Thompson G K, Lee S K. "Method for the Synthesis of 2-(6-Chloropyridazin-3-yl)-5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylic acid" [P]. US Patent, US 9993859 B2, 2018-01-02.
发明人何建平,刘建华,朱建伟. "A Process for Preparing High-Purity 2-(6-Chloropyridazin-3-yl)-5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108800931 B, 授权公告日 2019-05-05.
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