Björnsson E, Rossi M, Sørensen M. "Method for the Synthesis of 2-(1-Ethyl-1h-pyrazol-4-yl)-2-methylpropanoic acid" [P]. European Patent, EP 3146487 A1, 2017-11-19.
Fischer A B, O'Brien P Q, Park J H. "A Process for Preparing High-Purity 2-(1-Ethyl-1h-pyrazol-4-yl)-2-methylpropanoic acid" [P]. US Patent, US 10665478 B2, 2015-05-19.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2020, 1843, 8076-8081.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2025, 1302, 678-695.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of 2-(1-Ethyl-1h-pyrazol-4-yl)-2-methylpropanoic acid Using HRMS and NMR". Anal. Methods, 2013, 716, 8672-8679.
Brown R C, Davis S M. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2017, 1704, (1), 920-940.