发明人高志强,冯建国,林芳. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 109880867 A, 授权公告日 2019-08-25.
发明人杨光,赵玉洁,郭海燕. "Method for the Synthesis of 2-Hydroxy-5-methyl-4-oxo-3h,4h-pyrido[2,3-d]pyrimidine-7-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111152295 B, 授权公告日 2022-05-28.
参考文献 Literature
Jensen P, Larsen A M, Olsen K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2015, 550, 2941-2952.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2024, 2333, (11), 6177-6186.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of 2-Hydroxy-5-methyl-4-oxo-3h,4h-pyrido[2,3-d]pyrimidine-7-carboxylic acid Using HRMS and NMR". Sci. Total Environ., 2021, 2103, (1), 9942-9966.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2024, 1666, (1), 3616-3623.