发明人钱学锋,高志强,孙丽萍. "Method for the Synthesis of 1-(sec-Butyl)-2-imino-3-(phenylsulfonyl)-1H-dipyrido[1,2-a:2',3'-d]pyrimidin-5(2H)-one" [P]. 中国发明专利, 专利号 CN 114181800 B, 授权公告日 2025-03-24.
发明人杨光,张德明,周伟. "A Process for Preparing High-Purity 1-(sec-Butyl)-2-imino-3-(phenylsulfonyl)-1H-dipyrido[1,2-a:2',3'-d]pyrimidin-5(2H)-one" [P]. 中国发明专利, 专利号 CN 113969797 A, 授权公告日 2018-11-08.
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