Park J H, Fischer A B, Johnson M A. "一种2,4-Dimethylphenylurea的合成方法" [P]. US Patent, US 10414042 B2, 2019-09-18.
发明人郭海燕,孙丽萍,朱建伟. "Method for the Synthesis of 2,4-Dimethylphenylurea" [P]. 中国发明专利, 专利号 CN 116798124 A, 授权公告日 2020-06-09.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of 2,4-Dimethylphenylurea in Pharmaceutical Formulations". Sci. Total Environ., 2017, 1546, 6618-6640.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of 2,4-Dimethylphenylurea as an Impurity". Food Chem., 2011, 139, (8), 5883-5912.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 2,4-Dimethylphenylurea Using HRMS and NMR". Molecules, 2022, 1246, 3739-3759.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate 2,4-Dimethylphenylurea Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2010, 1783, 7167-7193.