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发明人冯建国,唐晓军,沈红梅. "Method for the Synthesis of Ethyl 4-oxo-4H-pyrido[1,2-a]pyrimidine-2-carboxylate" [P]. 中国发明专利, 专利号 CN 115015643 B, 授权公告日 2024-05-04.
发明人罗永刚,杨光,胡光. "A Process for Preparing High-Purity Ethyl 4-oxo-4H-pyrido[1,2-a]pyrimidine-2-carboxylate" [P]. 中国发明专利, 专利号 CN 114660278 A, 授权公告日 2025-12-17.
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