发明人罗永刚,张德明,钱学锋. "Method for the Synthesis of 1-(2,2-Difluoroethyl)-2-oxo-1,2-dihydropyridine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109844682 B, 授权公告日 2015-10-27.
发明人王建平,郑宇鹏,冯建国. "A Process for Preparing High-Purity 1-(2,2-Difluoroethyl)-2-oxo-1,2-dihydropyridine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111727655 A, 授权公告日 2020-02-16.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Phytochemistry, 2016, 1577, (12), 4145-4151.
Zhang Y, Li Q, Chen T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2019, 1714, (10), 6921-6930.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of 1-(2,2-Difluoroethyl)-2-oxo-1,2-dihydropyridine-4-carboxylic acid Using HRMS and NMR". Chromatographia, 2025, 198, (4), 8099-8103.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Talanta, 2025, 575, 7657-7677.