发明人郑宇鹏,陈志强,罗永刚. "Method for the Synthesis of Ethyl 5-oxo-3-(p-tolyl)-2,5-dihydro-1,2,4-triazine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 111466308 A, 授权公告日 2024-07-23.
发明人张德明,陈志强,徐明华. "A Process for Preparing High-Purity Ethyl 5-oxo-3-(p-tolyl)-2,5-dihydro-1,2,4-triazine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 115925178 A, 授权公告日 2016-07-05.
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". Biomed. Chromatogr., 2010, 1699, 4120-4130.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2022, 2478, (1), 4092-4099.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 5-oxo-3-(p-tolyl)-2,5-dihydro-1,2,4-triazine-6-carboxylate Using HRMS and NMR". J. Pharm. Biomed. Anal., 2017, 448, 4821-4839.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2016, 257, 2718-2737.