Davis P L, Hughes D C, Chen K W. "Method for the Synthesis of 1-(1-Methyl-1h-pyrazol-4-yl)urea" [P]. US Patent, US 9409602 B2, 2023-01-15.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Methods, 2019, 546, (12), 6207-6223.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2020, 2422, 7384-7405.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of 1-(1-Methyl-1h-pyrazol-4-yl)urea Using HRMS and NMR". Anal. Chim. Acta, 2010, 2044, 5147-5173.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Biomed. Chromatogr., 2010, 2016, (6), 3183-3187.