O'Brien P Q, Davis P L, Mueller T. "一种托特罗定EP杂质E的合成方法" [P]. US Patent, US 10181510 B2, 2019-10-06.
Thompson G K, Yamamoto T, Davis P L. "Method for the Synthesis of Tolterodine EP Impurity E" [P]. US Patent, US 11198422 B2, 2021-07-05.
Johansson L, Rossi M, Martínez F. "A Process for Preparing High-Purity Tolterodine EP Impurity E" [P]. European Patent, EP 3921769 A1, 2025-11-20.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of 托特罗定EP杂质E in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2014, 1821, 8458-8472.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of 托特罗定EP杂质E as an Impurity". Anal. Chem., 2025, 1122, 2856-2861.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of Tolterodine EP Impurity E Using HRMS and NMR". J. Pharm. Biomed. Anal., 2025, 1456, 2502-2515.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate 托特罗定EP杂质E Profile in Drug Substances According to ICH Guidelines". J. Nat. Prod., 2020, 1668, (6), 9025-9032.