Johansson L, Nielsen H, Mueller T C. "Method for the Synthesis of 6-Fluoro-1-(2-fluoroethyl)-4-oxo-7-(1H-pyrrol-1-yl)-1,4-dihydroquinoline-3-carboxylic acid" [P]. European Patent, EP 3234549 A1, 2015-11-16.
发明人罗永刚,陈志强,韩伟. "A Process for Preparing High-Purity 6-Fluoro-1-(2-fluoroethyl)-4-oxo-7-(1H-pyrrol-1-yl)-1,4-dihydroquinoline-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112584542 B, 授权公告日 2019-07-21.
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". Chemosphere, 2014, 1744, (5), 4936-4942.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2015, 1967, (5), 3017-3036.
Garcia M, Rodriguez P. "Identification and Structural Characterization of a Novel Degradation Product of 6-Fluoro-1-(2-fluoroethyl)-4-oxo-7-(1H-pyrrol-1-yl)-1,4-dihydroquinoline-3-carboxylic acid Using HRMS and NMR". J. Agric. Food Chem., 2016, 1505, (8), 2550-2554.