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发明人郭海燕,王建平,郑宇鹏. "A Process for Preparing High-Purity 2-[1-(4-Cyanophenyl)-1H-pyrrol-2-yl]-N,N-diethyl-2-oxoacetamide" [P]. 中国发明专利, 专利号 CN 108049949 A, 授权公告日 2015-06-23.
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