Johnson M A, Fischer A B, Park J H. "一种Upamostat Impurity4的合成方法" [P]. US Patent, US 10852900 B2, 2024-05-25.
Thompson G K, Stevens L M, Fischer A B. "Method for the Synthesis of Upamostat Impurity 4" [P]. US Patent, US 9114804 B2, 2017-07-28.
发明人徐明华,杨光,李文辉. "A Process for Preparing High-Purity Upamostat Impurity 4" [P]. 中国发明专利, 专利号 CN 116392292 A, 授权公告日 2020-03-28.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of Upamostat Impurity4 in Pharmaceutical Formulations". Chromatographia, 2010, 778, (2), 5880-5890.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of Upamostat Impurity4 as an Impurity". J. Chromatogr. A, 2012, 548, (7), 341-363.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of Upamostat Impurity 4 Using HRMS and NMR". Biomed. Chromatogr., 2016, 2126, 2798-2826.