发明人王建平,钱学锋,冯建国. "Method for the Synthesis of 7-Chloro-3,4-dihydro-2H-pyrimido[1,2-b]pyridazin-2-one" [P]. 中国发明专利, 专利号 CN 113641105 B, 授权公告日 2017-05-24.
发明人何建平,李文辉,王建平. "A Process for Preparing High-Purity 7-Chloro-3,4-dihydro-2H-pyrimido[1,2-b]pyridazin-2-one" [P]. 中国发明专利, 专利号 CN 108995313 B, 授权公告日 2023-03-27.
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