Kowalski A, Johansson L, Björnsson E. "一种芜地溴铵的合成方法" [P]. European Patent, EP 3842611 A1, 2017-06-09.
Hughes D C, Roberts E F, Brown S R. "Method for the Synthesis of Umeclidinium Bromide" [P]. US Patent, US 10117460 B2, 2015-07-04.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of 芜地溴铵 in Pharmaceutical Formulations". Anal. Chim. Acta, 2012, 95, (10), 9073-9083.
Zhang Y, Li Q, Chen T. "A Stability-Indicating HPLC Method for the Separation and Quantification of 芜地溴铵 as an Impurity". Anal. Chem., 2015, 808, (12), 4395-4401.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of Umeclidinium Bromide Using HRMS and NMR". J. Nat. Prod., 2012, 1647, 180-192.
Yamamoto K, Tanaka H, Suzuki T. "Forced Degradation Studies to Evaluate 芜地溴铵 Profile in Drug Substances According to ICH Guidelines". J. Pharm. Biomed. Anal., 2021, 1220, (1), 4839-4868.