Chen K W, Mueller T, Davis P L. "一种的合成方法" [P]. US Patent, US 9197520 B2, 2020-05-09.
Lefèvre J P, Kowalski A, Nielsen H. "Method for the Synthesis of 1-(2-Chloroethyl)-3-(2,4-difluorophenyl)urea" [P]. European Patent, EP 3997587 A1, 2024-08-21.
Chen K W, Mueller T, Park J H. "A Process for Preparing High-Purity 1-(2-Chloroethyl)-3-(2,4-difluorophenyl)urea" [P]. US Patent, US 9237982 B2, 2019-01-22.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2011, 412, (11), 4701-4722.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2016, 1172, 1191-1198.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of 1-(2-Chloroethyl)-3-(2,4-difluorophenyl)urea Using HRMS and NMR". J. Chromatogr. A, 2025, 2281, (11), 9881-9908.