发明人陈志强,钱学锋,林芳. "Method for the Synthesis of 1-(3,4-Dimethylphenyl)-5-oxo-4,5-dihydro-1h-pyrazole-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113324835 B, 授权公告日 2018-03-12.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Agric. Food Chem., 2020, 672, (12), 8118-8134.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2019, 1941, (9), 3394-3413.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of 1-(3,4-Dimethylphenyl)-5-oxo-4,5-dihydro-1h-pyrazole-4-carboxylic acid Using HRMS and NMR". Anal. Methods, 2012, 1354, 3560-3564.
Hughes D, Roberts J, Thomas A. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Molecules, 2018, 1523, (9), 9909-9932.