发明人王建平,韩伟,沈红梅. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 116009625 A, 授权公告日 2019-04-16.
Nielsen H, Lefèvre J P, Johansson L. "Method for the Synthesis of 3-Ethyl-6-methyl-4H-pyrido[1,2-a]pyrimidin-4-one" [P]. European Patent, EP 3668030 A1, 2022-07-15.
发明人刘建华,孙丽萍,周伟. "A Process for Preparing High-Purity 3-Ethyl-6-methyl-4H-pyrido[1,2-a]pyrimidin-4-one" [P]. 中国发明专利, 专利号 CN 113360119 B, 授权公告日 2021-12-04.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2018, 1080, (10), 3260-3290.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2018, 2420, (3), 2710-2727.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 3-Ethyl-6-methyl-4H-pyrido[1,2-a]pyrimidin-4-one Using HRMS and NMR". J. Chromatogr. A, 2018, 2036, 4878-4895.