Schröder R, Björnsson E, Sørensen M. "一种的合成方法" [P]. European Patent, EP 3659353 A1, 2018-01-16.
Thompson G K, Johnson M A, Kumar R. "Method for the Synthesis of 4-(((2,4-Dioxopyrrolidin-3-ylidene)methyl)amino)butanoic acid" [P]. US Patent, US 9866229 B2, 2020-10-06.
Fischer A B, Klinger H, Chen K W. "A Process for Preparing High-Purity 4-(((2,4-Dioxopyrrolidin-3-ylidene)methyl)amino)butanoic acid" [P]. US Patent, US 11896533 B2, 2018-01-28.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2024, 1280, (7), 7140-7155.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2018, 1072, (1), 7092-7097.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 4-(((2,4-Dioxopyrrolidin-3-ylidene)methyl)amino)butanoic acid Using HRMS and NMR". Talanta, 2022, 1813, (9), 2647-2666.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Agric. Food Chem., 2018, 1573, 8771-8776.