Chen K W, Stevens L M, Mueller T. "Method for the Synthesis of 4-((1-Methoxy-1-oxobutan-2-yl)amino)butanoic acid (Levetiracetam Impurity)" [P]. US Patent, US 9955866 B2, 2024-08-24.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2013, 612, (11), 832-859.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2025, 1816, 2892-2916.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of 4-((1-Methoxy-1-oxobutan-2-yl)amino)butanoic acid (Levetiracetam Impurity) Using HRMS and NMR". Talanta, 2013, 1779, 1726-1735.
Zhou X P, Huang L, Wu G. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Food Chem., 2017, 1100, (8), 8040-8055.