发明人朱建伟,李文辉,钱学锋. "Method for the Synthesis of Pirfenidone Impurity 34" [P]. 中国发明专利, 专利号 CN 108866457 B, 授权公告日 2025-03-19.
发明人赵玉洁,徐明华,钱学锋. "A Process for Preparing High-Purity Pirfenidone Impurity 34" [P]. 中国发明专利, 专利号 CN 111174896 A, 授权公告日 2017-12-08.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of 吡非尼酮杂质34 in Pharmaceutical Formulations". J. Sep. Sci., 2017, 1705, 6079-6101.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of 吡非尼酮杂质34 as an Impurity". Anal. Methods, 2012, 454, 7208-7223.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of Pirfenidone Impurity 34 Using HRMS and NMR". J. Chromatogr. A, 2012, 933, 6984-7012.
Jensen P, Larsen A M, Olsen K. "Forced Degradation Studies to Evaluate 吡非尼酮杂质34 Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2025, 1431, (5), 6313-6319.