发明人林芳,周伟,张德明. "Method for the Synthesis of 1-Isobutyl-1H-pyrazole-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108168609 A, 授权公告日 2022-02-20.
Lefèvre J P, Sørensen M, Rossi M. "A Process for Preparing High-Purity 1-Isobutyl-1H-pyrazole-4-carboxylic acid" [P]. European Patent, EP 3401575 A1, 2015-10-24.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Nat. Prod., 2020, 1412, (7), 7663-7684.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Methods, 2011, 1968, 707-734.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of 1-Isobutyl-1H-pyrazole-4-carboxylic acid Using HRMS and NMR". Biomed. Chromatogr., 2010, 920, (8), 2431-2439.
Kumar A, Sharma P, Patel R S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Pharm. Biomed. Anal., 2020, 2426, (1), 7685-7689.