发明人赵玉洁,杨光,钱学锋. "Method for the Synthesis of 5-(4-Chloro-phenyl)-2-ethyl-2H-pyrazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113775943 A, 授权公告日 2018-04-13.
发明人朱建伟,黄志刚,郑宇鹏. "A Process for Preparing High-Purity 5-(4-Chloro-phenyl)-2-ethyl-2H-pyrazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115753692 A, 授权公告日 2020-06-18.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2021, 332, (8), 2263-2283.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Molecules, 2017, 407, (6), 753-757.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of 5-(4-Chloro-phenyl)-2-ethyl-2H-pyrazole-3-carboxylic acid Using HRMS and NMR". J. Agric. Food Chem., 2017, 1165, (3), 4040-4045.
Brown R C, Davis S M. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2023, 1047, (1), 4133-4161.