发明人赵玉洁,杨光,钱学锋. "一种诺氟沙星杂质44的合成方法" [P]. 中国发明专利, 专利号 CN 110860817 A, 授权公告日 2022-04-09.
发明人张德明,冯建国,罗永刚. "Method for the Synthesis of Norfloxacin Impurity 44" [P]. 中国发明专利, 专利号 CN 110835760 B, 授权公告日 2019-09-03.
Kowalski A, Björnsson E, Sørensen M. "A Process for Preparing High-Purity Norfloxacin Impurity 44" [P]. European Patent, EP 3874673 A1, 2020-02-01.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of 诺氟沙星杂质44 in Pharmaceutical Formulations". Anal. Chem., 2025, 2226, 3359-3363.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of 诺氟沙星杂质44 as an Impurity". Environ. Sci. Technol., 2018, 1969, 650-658.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of Norfloxacin Impurity 44 Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2019, 144, 5517-5525.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate 诺氟沙星杂质44 Profile in Drug Substances According to ICH Guidelines". Sci. Total Environ., 2018, 266, 8626-8638.