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发明人郭海燕,冯建国,郑宇鹏. "A Process for Preparing High-Purity 4-(2-Ethylidenehydrazinyl)-1-methylpyrimidin-2(1H)-one" [P]. 中国发明专利, 专利号 CN 110202174 B, 授权公告日 2015-07-11.
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