Roberts E F, Hughes D C, Mueller T. "Method for the Synthesis of Roxadustat Impurity 9" [P]. US Patent, US 11752153 B2, 2016-08-07.
发明人林芳,杨光,沈红梅. "A Process for Preparing High-Purity Roxadustat Impurity 9" [P]. 中国发明专利, 专利号 CN 109348507 A, 授权公告日 2023-06-22.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of 罗沙司他杂质96 in Pharmaceutical Formulations". Environ. Sci. Technol., 2024, 1861, (7), 9129-9132.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of 罗沙司他杂质96 as an Impurity". Anal. Chem., 2020, 1979, (1), 4821-4830.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of Roxadustat Impurity 9 Using HRMS and NMR". Anal. Chim. Acta, 2011, 478, 3259-3289.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate 罗沙司他杂质96 Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2020, 1911, 8578-8585.