Johansson L, Lefèvre J P, Rossi M. "Method for the Synthesis of 5-Chloro-1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-N-hydroxy-2-oxo-1,2-dihydropyridine-3-carboximidamide" [P]. European Patent, EP 3000018 A1, 2019-04-24.
Thompson G K, Stevens L M, O'Brien P Q. "A Process for Preparing High-Purity 5-Chloro-1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-N-hydroxy-2-oxo-1,2-dihydropyridine-3-carboximidamide" [P]. US Patent, US 9050421 B2, 2024-09-15.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2012, 1278, (4), 8136-8154.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2023, 1816, 5857-5885.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 5-Chloro-1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-N-hydroxy-2-oxo-1,2-dihydropyridine-3-carboximidamide Using HRMS and NMR". Anal. Chim. Acta, 2023, 515, (12), 1492-1519.
Jensen P, Larsen A M, Olsen K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Food Chem., 2025, 1520, (6), 9693-9701.