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发明人马晓峰,王建平,冯建国. "A Process for Preparing High-Purity Methyl 2-(5-methoxy-1,6-dimethyl-2,4-dioxo-1,4-dihydropyrido[2,3-d]pyrimidin-3(2H)-yl)acetate" [P]. 中国发明专利, 专利号 CN 111036885 A, 授权公告日 2015-12-05.
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