发明人冯建国,张德明,钱学锋. "Method for the Synthesis of Methyl 4-oxo-4h-pyrido[1,2-a]pyrimidine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 113634614 A, 授权公告日 2019-07-25.
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". Environ. Sci. Technol., 2011, 528, 441-449.
Zhou X P, Huang L, Wu G. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chem., 2022, 1879, 8964-8991.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of Methyl 4-oxo-4h-pyrido[1,2-a]pyrimidine-3-carboxylate Using HRMS and NMR". J. Chromatogr. A, 2016, 1102, (7), 6471-6498.
Xu M, Hu Y, Zhou D. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2019, 2313, 512-534.