发明人黄志刚,马晓峰,林芳. "Method for the Synthesis of 1-Butyl-N-(furan-2-ylmethyl)-2-imino-10-methyl-5-oxo-2,5-dihydro-1H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide" [P]. 中国发明专利, 专利号 CN 115475393 B, 授权公告日 2019-11-24.
发明人郭海燕,孙丽萍,林芳. "A Process for Preparing High-Purity 1-Butyl-N-(furan-2-ylmethyl)-2-imino-10-methyl-5-oxo-2,5-dihydro-1H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide" [P]. 中国发明专利, 专利号 CN 110242339 B, 授权公告日 2018-02-20.
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