Björnsson E, Mueller T C, Nielsen H. "Method for the Synthesis of Ethyl 3-cyano-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-5-carboxylate" [P]. European Patent, EP 3208731 A1, 2023-11-01.
发明人罗永刚,沈红梅,冯建国. "A Process for Preparing High-Purity Ethyl 3-cyano-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-5-carboxylate" [P]. 中国发明专利, 专利号 CN 112525854 B, 授权公告日 2023-01-06.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Nat. Prod., 2022, 1525, (1), 6140-6161.
Jensen P, Larsen A M, Olsen K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2014, 846, (11), 8588-8609.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 3-cyano-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-5-carboxylate Using HRMS and NMR". J. Pharm. Biomed. Anal., 2018, 2198, (6), 9410-9425.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2022, 1420, (11), 4863-4875.