Yamamoto T, Thompson G K, Hughes D C. "Method for the Synthesis of 4-(1,1-Difluoroethyl)-1H-pyrazole" [P]. US Patent, US 10263376 B2, 2022-03-11.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2013, 658, 6154-6182.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2021, 192, (7), 9582-9592.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 4-(1,1-Difluoroethyl)-1H-pyrazole Using HRMS and NMR". J. Pharm. Biomed. Anal., 2012, 792, 4558-4572.
Xu M, Hu Y, Zhou D. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2020, 428, 3897-3900.