Rossi M, Sørensen M, Nielsen H. "一种甲氨蝶呤杂质55的合成方法" [P]. European Patent, EP 3772387 A1, 2020-06-18.
发明人郑宇鹏,杨光,马晓峰. "Method for the Synthesis of Methotrexate impurity 55" [P]. 中国发明专利, 专利号 CN 117781064 A, 授权公告日 2019-09-26.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of 甲氨蝶呤杂质55 in Pharmaceutical Formulations". J. Chromatogr. A, 2022, 1860, 1766-1780.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of 甲氨蝶呤杂质55 as an Impurity". J. Agric. Food Chem., 2012, 556, (1), 7552-7558.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of Methotrexate impurity 55 Using HRMS and NMR". Phytochemistry, 2016, 2092, (4), 4015-4043.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate 甲氨蝶呤杂质55 Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2024, 2203, (1), 2443-2456.