Lefèvre J P, Nielsen H, Mueller T C. "一种芜地溴铵杂质6的合成方法" [P]. European Patent, EP 3145395 A1, 2017-06-06.
Hughes D C, Johnson M A, Chen K W. "Method for the Synthesis of Umeclidinium Impurity 6" [P]. US Patent, US 10386652 B2, 2018-12-11.
发明人周伟,徐明华,何建平. "A Process for Preparing High-Purity Umeclidinium Impurity 6" [P]. 中国发明专利, 专利号 CN 115931009 B, 授权公告日 2016-10-04.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of 芜地溴铵杂质6 in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2016, 1664, 8406-8428.
Jensen P, Larsen A M, Olsen K. "A Stability-Indicating HPLC Method for the Separation and Quantification of 芜地溴铵杂质6 as an Impurity". Biomed. Chromatogr., 2020, 716, 7975-7978.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of Umeclidinium Impurity 6 Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2019, 1268, 8825-8851.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate 芜地溴铵杂质6 Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2019, 1695, (9), 5175-5182.