Williams B T, Brown S R, Roberts E F. "一种恩替卡韦杂质60的合成方法" [P]. US Patent, US 9824583 B2, 2019-09-28.
Fischer A B, O'Brien P Q, Chen K W. "Method for the Synthesis of Entecavir Impurity 60" [P]. US Patent, US 11635519 B2, 2019-02-27.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of 恩替卡韦杂质60 in Pharmaceutical Formulations". J. Nat. Prod., 2017, 340, (9), 3142-3154.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of 恩替卡韦杂质60 as an Impurity". J. Sep. Sci., 2021, 1686, (9), 4144-4157.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of Entecavir Impurity 60 Using HRMS and NMR". Anal. Methods, 2011, 781, (9), 875-878.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate 恩替卡韦杂质60 Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2011, 694, 5344-5350.