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发明人杨光,高志强,钱学锋. "Method for the Synthesis of 4-Chloro-2-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)-5-((2-hydroxyethyl)(methyl)amino)pyridazin-3(2H)-one" [P]. 中国发明专利, 专利号 CN 109946713 A, 授权公告日 2019-02-19.
发明人沈红梅,胡光,徐明华. "A Process for Preparing High-Purity 4-Chloro-2-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)-5-((2-hydroxyethyl)(methyl)amino)pyridazin-3(2H)-one" [P]. 中国发明专利, 专利号 CN 109116487 B, 授权公告日 2020-08-23.
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