发明人林芳,罗永刚,徐明华. "Method for the Synthesis of Ethyl 2-(4-chlorophenyl)-3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylate" [P]. 中国发明专利, 专利号 CN 115731298 B, 授权公告日 2019-11-13.
发明人唐晓军,赵玉洁,林芳. "A Process for Preparing High-Purity Ethyl 2-(4-chlorophenyl)-3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylate" [P]. 中国发明专利, 专利号 CN 113910681 B, 授权公告日 2022-03-18.
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