发明人杨光,刘建华,韩伟. "Method for the Synthesis of 1-(2-cyanoethyl)-3-(3,4-dimethylphenyl)-1H-pyrazole-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111440184 B, 授权公告日 2023-08-26.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of 1-(2-cyanoethyl)-3-(3,4-dimethylphenyl)-1H-pyrazole-4-carboxylic acid in Pharmaceutical Formulations". Molecules, 2014, 1671, (6), 3617-3629.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of 1-(2-cyanoethyl)-3-(3,4-dimethylphenyl)-1H-pyrazole-4-carboxylic acid as an Impurity". J. Chromatogr. A, 2012, 631, (7), 5063-5087.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of 1-(2-cyanoethyl)-3-(3,4-dimethylphenyl)-1H-pyrazole-4-carboxylic acid Using HRMS and NMR". Chromatographia, 2020, 1006, (3), 4317-4346.
Hughes D, Roberts J, Thomas A. "Forced Degradation Studies to Evaluate 1-(2-cyanoethyl)-3-(3,4-dimethylphenyl)-1H-pyrazole-4-carboxylic acid Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2014, 1544, (7), 3460-3488.