发明人张德明,黄志刚,李文辉. "Method for the Synthesis of Ethyl 2-chloro-3-(difluoromethoxy)isonicotinate" [P]. 中国发明专利, 专利号 CN 109642704 B, 授权公告日 2021-05-21.
发明人郭海燕,周伟,孙丽萍. "A Process for Preparing High-Purity Ethyl 2-chloro-3-(difluoromethoxy)isonicotinate" [P]. 中国发明专利, 专利号 CN 109198605 B, 授权公告日 2018-03-04.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Molecules, 2022, 1753, (1), 2581-2593.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2013, 767, 8157-8183.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 2-chloro-3-(difluoromethoxy)isonicotinate Using HRMS and NMR". J. Sep. Sci., 2011, 334, 3659-3664.
Kumar A, Sharma P, Patel R S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2016, 224, (8), 5432-5435.