Roberts E F, Thompson G K, Stevens L M. "一种的合成方法" [P]. US Patent, US 9669036 B2, 2018-09-03.
Björnsson E, Sørensen M, Nowak P. "Method for the Synthesis of 4-((4-((2-(4-Nitrophenyl)-2-oxoethoxy)carbonyl)phenyl)amino)-4-oxobutanoic acid" [P]. European Patent, EP 3900982 A1, 2024-05-02.
Williams B T, Klinger H, Johnson M A. "A Process for Preparing High-Purity 4-((4-((2-(4-Nitrophenyl)-2-oxoethoxy)carbonyl)phenyl)amino)-4-oxobutanoic acid" [P]. US Patent, US 9218933 B2, 2024-03-14.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2012, 959, (8), 9858-9871.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2016, 309, (5), 4977-4985.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 4-((4-((2-(4-Nitrophenyl)-2-oxoethoxy)carbonyl)phenyl)amino)-4-oxobutanoic acid Using HRMS and NMR". J. Pharm. Biomed. Anal., 2021, 596, 1513-1539.
Zhou X P, Huang L, Wu G. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chromatographia, 2016, 1122, 5067-5076.