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发明人郑宇鹏,黄志刚,刘建华. "A Process for Preparing High-Purity 2-(Pyridin-2-yl)-4-(pyridin-4-yl)pyrimidine-5-carbohydrazide" [P]. 中国发明专利, 专利号 CN 115183684 A, 授权公告日 2016-08-06.
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