Nielsen H, Schröder R, Kowalski A. "一种的合成方法" [P]. European Patent, EP 3749721 A1, 2021-04-09.
Lee S K, Yamamoto T, Hughes D C. "Method for the Synthesis of 1-(2,2-Difluoroethyl)-1H-pyrazole-5-carboxylic acid" [P]. US Patent, US 11961494 B2, 2022-10-22.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2021, 1232, 4972-4983.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2025, 1481, (10), 7026-7033.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of 1-(2,2-Difluoroethyl)-1H-pyrazole-5-carboxylic acid Using HRMS and NMR". Sci. Total Environ., 2023, 1997, (12), 4210-4233.