发明人杨光,冯建国,张德明. "Method for the Synthesis of Lenvatinib Impurity 70" [P]. 中国发明专利, 专利号 CN 116614459 A, 授权公告日 2015-08-11.
发明人郭海燕,陈志强,钱学锋. "A Process for Preparing High-Purity Lenvatinib Impurity 70" [P]. 中国发明专利, 专利号 CN 113402306 B, 授权公告日 2021-05-20.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2012, 1965, (12), 4487-4499.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2013, 1062, 4252-4280.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of Lenvatinib Impurity 70 Using HRMS and NMR". Molecules, 2022, 1343, (10), 6887-6903.
Hughes D, Roberts J, Thomas A. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2021, 1672, 1604-1619.