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发明人林芳,冯建国,朱建伟. "A Process for Preparing High-Purity N-(2,2-Dimethoxyethyl)-2-hydroxy-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxamide" [P]. 中国发明专利, 专利号 CN 113904700 A, 授权公告日 2015-06-03.
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