Rossi M, Sørensen M, Martínez F. "Method for the Synthesis of Methyl 2-(1-(3-formyl-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-2-yl)-3-oxopiperazin-2-yl)acetate" [P]. European Patent, EP 3287693 A1, 2025-06-14.
发明人赵玉洁,孙丽萍,刘建华. "A Process for Preparing High-Purity Methyl 2-(1-(3-formyl-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-2-yl)-3-oxopiperazin-2-yl)acetate" [P]. 中国发明专利, 专利号 CN 113640841 A, 授权公告日 2025-08-16.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2015, 148, (2), 1979-2000.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Molecules, 2019, 652, (3), 7982-8003.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of Methyl 2-(1-(3-formyl-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-2-yl)-3-oxopiperazin-2-yl)acetate Using HRMS and NMR". Food Chem., 2023, 247, (5), 2792-2821.