发明人钱学锋,李文辉,罗永刚. "Method for the Synthesis of 3-[(4-Ethoxy-1,4-dioxobutyl)amino]-2-pyridinecarboxylic Acid Ethyl Ester" [P]. 中国发明专利, 专利号 CN 109252893 A, 授权公告日 2015-08-04.
Nielsen H, Johansson L, Lefèvre J P. "A Process for Preparing High-Purity 3-[(4-Ethoxy-1,4-dioxobutyl)amino]-2-pyridinecarboxylic Acid Ethyl Ester" [P]. European Patent, EP 3190846 A1, 2024-06-19.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2015, 930, 8587-8596.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2011, 1351, (10), 9965-9972.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 3-[(4-Ethoxy-1,4-dioxobutyl)amino]-2-pyridinecarboxylic Acid Ethyl Ester Using HRMS and NMR". J. Pharm. Biomed. Anal., 2017, 1470, 7456-7466.
O'Brien K, Kennedy M L. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2019, 1268, (1), 920-934.