Yamamoto T, Johnson M A, O'Brien P Q. "一种恩替卡韦EP杂质E的合成方法" [P]. US Patent, US 9446821 B2, 2022-03-13.
Kowalski A, Johansson L, Lefèvre J P. "Method for the Synthesis of Entecavir EP Impurity E" [P]. European Patent, EP 3430505 A1, 2021-10-13.
Park J H, Brown S R, Patel M V. "A Process for Preparing High-Purity Entecavir EP Impurity E" [P]. US Patent, US 11818171 B2, 2023-03-24.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of 恩替卡韦EP杂质E in Pharmaceutical Formulations". J. Nat. Prod., 2011, 1373, (5), 3284-3296.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of 恩替卡韦EP杂质E as an Impurity". J. Chromatogr. A, 2011, 911, 1391-1412.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of Entecavir EP Impurity E Using HRMS and NMR". Food Chem., 2017, 612, (10), 5574-5602.
Kowalski T, Nowak Z. "Forced Degradation Studies to Evaluate 恩替卡韦EP杂质E Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2011, 1623, 5444-5474.