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发明人孙丽萍,冯建国,李文辉. "A Process for Preparing High-Purity 3-Methyl-4H-pyrido[1,2-a]pyrimidin-4-one" [P]. 中国发明专利, 专利号 CN 112994644 A, 授权公告日 2020-03-19.
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