Lee S K, Patel M V, Mueller T. "Method for the Synthesis of 4-Chloro-5-methyl-1H-pyrazole-3-carboxylic acid" [P]. US Patent, US 9038031 B2, 2019-10-28.
Klinger H, Park J H, O'Brien P Q. "A Process for Preparing High-Purity 4-Chloro-5-methyl-1H-pyrazole-3-carboxylic acid" [P]. US Patent, US 9799372 B2, 2022-09-13.
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 4-氯-5-甲基-1H-吡唑-3-羧酸 in Pharmaceutical Formulations". Anal. Chim. Acta, 2014, 437, (6), 249-274.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of 4-氯-5-甲基-1H-吡唑-3-羧酸 as an Impurity". Biomed. Chromatogr., 2022, 2201, 1715-1742.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of 4-Chloro-5-methyl-1H-pyrazole-3-carboxylic acid Using HRMS and NMR". J. Chromatogr. A, 2020, 2268, (6), 6389-6408.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate 4-氯-5-甲基-1H-吡唑-3-羧酸 Profile in Drug Substances According to ICH Guidelines". Molecules, 2014, 618, (1), 3623-3650.