Park J H, Lee S K, Yamamoto T. "一种的合成方法" [P]. US Patent, US 10561899 B2, 2023-06-12.
Chen K W, Johnson M A, Hughes D C. "Method for the Synthesis of 2-Methyl-3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-2-carboxylic acid" [P]. US Patent, US 9878742 B2, 2019-11-26.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2012, 844, (2), 5623-5653.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2010, 1391, (10), 5851-5869.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 2-Methyl-3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-2-carboxylic acid Using HRMS and NMR". J. Pharm. Biomed. Anal., 2021, 731, (6), 8817-8822.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Molecules, 2013, 907, (4), 6278-6307.