发明人高志强,杨光,郑宇鹏. "Method for the Synthesis of 4-Methyl-5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108880995 B, 授权公告日 2018-12-02.
发明人陈志强,高志强,冯建国. "A Process for Preparing High-Purity 4-Methyl-5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114533270 B, 授权公告日 2020-01-07.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2025, 2034, 8105-8114.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2022, 233, 2303-2312.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 4-Methyl-5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylic acid Using HRMS and NMR". Anal. Chem., 2021, 2254, 2202-2224.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2022, 1995, (4), 8185-8197.