Williams B T, Patel M V, Lee S K. "Method for the Synthesis of 2-Oxo-2,4-dihydro-1H-3,1-benzoxazine-6-carboxylic acid" [P]. US Patent, US 9103575 B2, 2024-05-15.
Nowak P, Lefèvre J P, Martínez F. "A Process for Preparing High-Purity 2-Oxo-2,4-dihydro-1H-3,1-benzoxazine-6-carboxylic acid" [P]. European Patent, EP 3810949 A1, 2023-03-19.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Agric. Food Chem., 2010, 1641, 6807-6814.
Jensen P, Larsen A M, Olsen K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2014, 1708, (3), 6843-6848.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of 2-Oxo-2,4-dihydro-1H-3,1-benzoxazine-6-carboxylic acid Using HRMS and NMR". Talanta, 2018, 1105, 9081-9090.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2021, 950, 9308-9316.