Johansson L, Nowak P, Lefèvre J P. "Method for the Synthesis of 2-(4-Bromophenyl)-4-(ethylthio)pyrazolo[1,5-a]pyrazine" [P]. European Patent, EP 3502669 A1, 2021-08-17.
发明人王建平,郑宇鹏,何建平. "A Process for Preparing High-Purity 2-(4-Bromophenyl)-4-(ethylthio)pyrazolo[1,5-a]pyrazine" [P]. 中国发明专利, 专利号 CN 113404038 B, 授权公告日 2020-06-01.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2015, 1941, (6), 9411-9436.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Methods, 2020, 1064, (1), 923-940.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 2-(4-Bromophenyl)-4-(ethylthio)pyrazolo[1,5-a]pyrazine Using HRMS and NMR". Talanta, 2010, 293, (4), 5286-5307.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2023, 389, 4847-4860.