发明人孙丽萍,赵玉洁,陈志强. "Method for the Synthesis of 1-(sec-Butyl)-3-((4-chlorophenyl)sulfonyl)-2-imino-1H-dipyrido[1,2-a:2',3'-d]pyrimidin-5(2H)-one" [P]. 中国发明专利, 专利号 CN 116049213 A, 授权公告日 2023-05-01.
发明人钱学锋,高志强,郭海燕. "A Process for Preparing High-Purity 1-(sec-Butyl)-3-((4-chlorophenyl)sulfonyl)-2-imino-1H-dipyrido[1,2-a:2',3'-d]pyrimidin-5(2H)-one" [P]. 中国发明专利, 专利号 CN 110826312 A, 授权公告日 2016-11-28.
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