Lee S K, Park J H, Thompson G K. "Method for the Synthesis of 1-tert-butyl-1H-pyrazole-4-carboxylic acid" [P]. US Patent, US 10797870 B2, 2024-04-26.
Nielsen H, Lefèvre J P, Nowak P. "A Process for Preparing High-Purity 1-tert-butyl-1H-pyrazole-4-carboxylic acid" [P]. European Patent, EP 3773460 A1, 2021-01-06.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2024, 2346, (4), 7064-7078.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2017, 420, 2631-2642.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 1-tert-butyl-1H-pyrazole-4-carboxylic acid Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2010, 1559, (7), 7881-7901.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Sci. Total Environ., 2016, 1044, 7426-7455.