Johnson M A, Stevens L M, Williams B T. "一种拓泊替康杂质4的合成方法" [P]. US Patent, US 9126219 B2, 2023-01-11.
Jørgensen K, Rossi M, Lefèvre J P. "Method for the Synthesis of Topotecan Impurity 4" [P]. European Patent, EP 3769413 A1, 2016-03-17.
发明人杨光,王建平,周伟. "A Process for Preparing High-Purity Topotecan Impurity 4" [P]. 中国发明专利, 专利号 CN 117720384 A, 授权公告日 2017-11-11.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of 拓泊替康杂质4 in Pharmaceutical Formulations". J. Agric. Food Chem., 2011, 1940, (2), 6007-6021.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of 拓泊替康杂质4 as an Impurity". Food Chem., 2019, 1708, (8), 4004-4024.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of Topotecan Impurity 4 Using HRMS and NMR". Anal. Methods, 2011, 587, (10), 2994-3000.