发明人唐晓军,赵玉洁,郑宇鹏. "Method for the Synthesis of 1-Butyl-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyrimidine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115628109 A, 授权公告日 2015-12-13.
发明人陈志强,冯建国,林芳. "A Process for Preparing High-Purity 1-Butyl-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyrimidine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111286847 B, 授权公告日 2018-09-26.
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