Lefèvre J P, Björnsson E, Kowalski A. "一种的合成方法" [P]. European Patent, EP 3916064 A1, 2024-02-22.
Lefèvre J P, Johansson L, Kowalski A. "Method for the Synthesis of Ethyl 3-oxo-4-((3-(p-tolyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)thio)butanoate" [P]. European Patent, EP 3726191 A1, 2024-09-20.
发明人林芳,杨光,郭海燕. "A Process for Preparing High-Purity Ethyl 3-oxo-4-((3-(p-tolyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)thio)butanoate" [P]. 中国发明专利, 专利号 CN 113570941 B, 授权公告日 2022-11-04.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2024, 1505, (12), 7380-7384.
Zhang Y, Li Q, Chen T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2020, 518, 2555-2566.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 3-oxo-4-((3-(p-tolyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)thio)butanoate Using HRMS and NMR". Phytochemistry, 2011, 1454, (11), 9196-9211.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2014, 428, (11), 7388-7398.