发明人李文辉,何建平,高志强. "Method for the Synthesis of 4-(2-hydroxyethyl)-1-(4-methylphenyl)-5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114113762 A, 授权公告日 2017-04-22.
发明人黄志刚,徐明华,胡光. "A Process for Preparing High-Purity 4-(2-hydroxyethyl)-1-(4-methylphenyl)-5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108141209 B, 授权公告日 2023-02-22.
参考文献 Literature
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Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 4-(2-hydroxyethyl)-1-(4-methylphenyl)-5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylic acid Using HRMS and NMR". Sci. Total Environ., 2010, 1483, (7), 6747-6773.