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发明人徐明华,王建平,高志强. "Method for the Synthesis of 2-(Ethylamino)-3-((ethylimino)methyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one" [P]. 中国发明专利, 专利号 CN 114025552 B, 授权公告日 2015-08-04.
发明人钱学锋,高志强,王建平. "A Process for Preparing High-Purity 2-(Ethylamino)-3-((ethylimino)methyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one" [P]. 中国发明专利, 专利号 CN 113666773 B, 授权公告日 2019-02-26.
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