发明人何建平,林芳,陈志强. "Method for the Synthesis of 5-ethyl-1-[4-(trifluoromethyl)phenyl]-1H-pyrazole-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116117971 A, 授权公告日 2017-09-23.
发明人刘建华,冯建国,马晓峰. "A Process for Preparing High-Purity 5-ethyl-1-[4-(trifluoromethyl)phenyl]-1H-pyrazole-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113345381 B, 授权公告日 2022-02-18.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of 5-ethyl-1-[4-(trifluoromethyl)phenyl]-1H-pyrazole-4-carboxylic acid in Pharmaceutical Formulations". Biomed. Chromatogr., 2013, 365, (2), 4513-4525.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of 5-ethyl-1-[4-(trifluoromethyl)phenyl]-1H-pyrazole-4-carboxylic acid as an Impurity". J. Chromatogr. A, 2025, 536, (10), 8777-8793.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 5-ethyl-1-[4-(trifluoromethyl)phenyl]-1H-pyrazole-4-carboxylic acid Using HRMS and NMR". Environ. Sci. Technol., 2016, 1857, (1), 7490-7498.