发明人张德明,赵玉洁,何建平. "Method for the Synthesis of 4-(((1-Ethyl-5-methyl-1H-pyrazol-4-yl)methyl)amino)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 108380310 A, 授权公告日 2015-05-16.
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