发明人郑宇鹏,马晓峰,唐晓军. "一种N/A的合成方法" [P]. 中国发明专利, 专利号 CN 117148126 A, 授权公告日 2025-02-13.
发明人钱学锋,罗永刚,周伟. "Method for the Synthesis of 3-Hydroxy-2-oxo-1,2-dihydropyridine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116463764 B, 授权公告日 2025-03-01.
Schröder R, Brown S R, Patel M V. "A Process for Preparing High-Purity 3-Hydroxy-2-oxo-1,2-dihydropyridine-4-carboxylic acid" [P]. US Patent, US 10329339 B2, 2022-09-26.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". J. Chromatogr. A, 2019, 1327, 5020-5030.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Environ. Sci. Technol., 2015, 720, 1496-1514.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 3-Hydroxy-2-oxo-1,2-dihydropyridine-4-carboxylic acid Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2010, 1384, (9), 5042-5072.