Mueller T C, Lefèvre J P, Johansson L. "一种N-亚硝基色氨酸EP杂质I的合成方法" [P]. European Patent, EP 3978069 A1, 2016-12-08.
Mueller T C, Jørgensen K, Nowak P. "Method for the Synthesis of N1-Nitroso Tryptophan EP Impurity I" [P]. European Patent, EP 3077029 A1, 2018-03-10.
Yamamoto T, Patel M V, Kumar R. "A Process for Preparing High-Purity N1-Nitroso Tryptophan EP Impurity I" [P]. US Patent, US 9526131 B2, 2020-11-13.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of N-亚硝基色氨酸EP杂质I in Pharmaceutical Formulations". Talanta, 2025, 1800, (12), 9695-9711.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of N-亚硝基色氨酸EP杂质I as an Impurity". J. Agric. Food Chem., 2012, 503, (4), 9368-9395.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of N1-Nitroso Tryptophan EP Impurity I Using HRMS and NMR". Chromatographia, 2020, 686, (6), 8307-8310.
Hughes D, Roberts J, Thomas A. "Forced Degradation Studies to Evaluate N-亚硝基色氨酸EP杂质I Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2015, 1317, 7273-7303.