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发明人黄志刚,钱学锋,张德明. "A Process for Preparing High-Purity 2-Ethyl-6-methyl-4H-pyrido[1,2-a]pyrimidin-4-one" [P]. 中国发明专利, 专利号 CN 112364412 B, 授权公告日 2016-06-19.
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