发明人王建平,高志强,唐晓军. "Method for the Synthesis of 7-Methyl-4-oxo-4H-pyrimido[2,1-a]isoquinoline-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110189795 A, 授权公告日 2017-01-05.
发明人孙丽萍,黄志刚,冯建国. "A Process for Preparing High-Purity 7-Methyl-4-oxo-4H-pyrimido[2,1-a]isoquinoline-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115243132 B, 授权公告日 2024-12-26.
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