Anderson J P, Patel M V, Chen K W. "一种的合成方法" [P]. US Patent, US 9661447 B2, 2021-12-06.
发明人沈红梅,刘建华,韩伟. "Method for the Synthesis of 5-Hydroxy Leflunomide (Metabolite M2)" [P]. 中国发明专利, 专利号 CN 115509458 A, 授权公告日 2015-02-02.
Jørgensen K, Rossi M, Björnsson E. "A Process for Preparing High-Purity 5-Hydroxy Leflunomide (Metabolite M2)" [P]. European Patent, EP 3550037 A1, 2015-11-02.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2017, 217, (12), 6037-6043.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2014, 850, 8069-8078.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 5-Hydroxy Leflunomide (Metabolite M2) Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2015, 157, 1684-1696.
Yamamoto K, Tanaka H, Suzuki T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Phytochemistry, 2016, 1895, 8386-8392.