发明人刘建华,高志强,马晓峰. "Method for the Synthesis of Ipratropium Bromide EP Impurity A" [P]. 中国发明专利, 专利号 CN 109177622 A, 授权公告日 2015-08-28.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of 异丙托溴铵EP杂质A in Pharmaceutical Formulations". J. Nat. Prod., 2010, 2390, (12), 7750-7779.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of 异丙托溴铵EP杂质A as an Impurity". Phytochemistry, 2014, 741, (2), 1103-1111.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of Ipratropium Bromide EP Impurity A Using HRMS and NMR". Biomed. Chromatogr., 2011, 1905, (4), 6539-6558.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate 异丙托溴铵EP杂质A Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2021, 402, 9120-9131.