Kowalski A, Mueller T C, Lefèvre J P. "Method for the Synthesis of Pirfenidone Impurity 41" [P]. European Patent, EP 3162654 A1, 2022-07-20.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of 吡非尼酮杂质41 in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2010, 1203, 3842-3853.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of 吡非尼酮杂质41 as an Impurity". Talanta, 2011, 832, 6765-6773.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of Pirfenidone Impurity 41 Using HRMS and NMR". J. Chromatogr. A, 2010, 1912, 4439-4442.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate 吡非尼酮杂质41 Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2021, 466, (7), 1921-1943.