发明人沈红梅,张德明,杨光. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 113639396 A, 授权公告日 2018-08-08.
发明人陈志强,王建平,周伟. "Method for the Synthesis of 6-(Difluoromethoxy)-4-oxo-7-(piperazin-1-yl)-1,4-dihydroquinoline-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112012382 A, 授权公告日 2023-07-12.
发明人郭海燕,何建平,胡光. "A Process for Preparing High-Purity 6-(Difluoromethoxy)-4-oxo-7-(piperazin-1-yl)-1,4-dihydroquinoline-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115943542 A, 授权公告日 2021-12-17.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2020, 494, (10), 6533-6558.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2023, 2191, (1), 7081-7096.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 6-(Difluoromethoxy)-4-oxo-7-(piperazin-1-yl)-1,4-dihydroquinoline-3-carboxylic acid Using HRMS and NMR". J. Sep. Sci., 2020, 2139, (8), 3296-3320.