发明人黄志刚,陈志强,李文辉. "Method for the Synthesis of 4-Hydroxy-6-oxo-1-(p-tolyl)-1,6-dihydropyridazine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109387152 A, 授权公告日 2017-01-03.
发明人朱建伟,沈红梅,赵玉洁. "A Process for Preparing High-Purity 4-Hydroxy-6-oxo-1-(p-tolyl)-1,6-dihydropyridazine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112963320 A, 授权公告日 2015-01-18.
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