发明人刘建华,冯建国,钱学锋. "Method for the Synthesis of 2-Methyl-5-oxo-2,5-dihydro-1H-pyrazole-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 108604197 B, 授权公告日 2015-10-26.
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