Johansson L, Schröder R, Rossi M. "Method for the Synthesis of Methotrexate Impurity 43" [P]. European Patent, EP 3633122 A1, 2017-02-20.
发明人郑宇鹏,罗永刚,高志强. "A Process for Preparing High-Purity Methotrexate Impurity 43" [P]. 中国发明专利, 专利号 CN 112710408 A, 授权公告日 2016-10-15.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of 甲氨蝶呤杂质43 in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2020, 272, 7303-7312.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of 甲氨蝶呤杂质43 as an Impurity". J. Pharm. Biomed. Anal., 2011, 2321, (11), 1936-1953.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of Methotrexate Impurity 43 Using HRMS and NMR". Anal. Chim. Acta, 2017, 456, 4187-4205.