Mueller T, Thompson G K, Schröder R. "Method for the Synthesis of 1-Methyl-1-(2-methyl-4,5,6,7-tetrahydro-2H-indazol-3-yl)urea" [P]. US Patent, US 9716606 B2, 2024-05-05.
发明人林芳,孙丽萍,刘建华. "A Process for Preparing High-Purity 1-Methyl-1-(2-methyl-4,5,6,7-tetrahydro-2H-indazol-3-yl)urea" [P]. 中国发明专利, 专利号 CN 115302612 B, 授权公告日 2016-02-23.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2011, 319, 371-381.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2023, 1227, (10), 2866-2892.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of 1-Methyl-1-(2-methyl-4,5,6,7-tetrahydro-2H-indazol-3-yl)urea Using HRMS and NMR". Phytochemistry, 2011, 1765, (9), 5023-5027.
O'Brien K, Kennedy M L. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2016, 1046, 8659-8665.