Chen K W, Williams B T, Fischer A B. "一种的合成方法" [P]. US Patent, US 9631722 B2, 2023-05-14.
发明人杨光,郭海燕,孙丽萍. "Method for the Synthesis of 1-Ethyl-N-(5-(isoxazol-5-yl)-1,3,4-oxadiazol-2-yl)-3-methyl-1H-pyrazole-5-carboxamide" [P]. 中国发明专利, 专利号 CN 112109280 B, 授权公告日 2018-12-11.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2010, 2038, 773-787.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2012, 1690, (12), 9968-9983.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of 1-Ethyl-N-(5-(isoxazol-5-yl)-1,3,4-oxadiazol-2-yl)-3-methyl-1H-pyrazole-5-carboxamide Using HRMS and NMR". J. Pharm. Biomed. Anal., 2021, 177, (5), 5887-5911.
Yamamoto K, Tanaka H, Suzuki T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2011, 1949, 8833-8844.