发明人高志强,冯建国,孙丽萍. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 115941005 A, 授权公告日 2025-09-02.
Davis P L, Lee S K, Kumar R. "Method for the Synthesis of 6-Methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-2-carboxylic acid methyl ester" [P]. US Patent, US 11077344 B2, 2016-12-16.
发明人王建平,赵玉洁,钱学锋. "A Process for Preparing High-Purity 6-Methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-2-carboxylic acid methyl ester" [P]. 中国发明专利, 专利号 CN 110116938 B, 授权公告日 2017-02-08.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2014, 1587, 1550-1571.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2012, 650, (2), 407-412.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of 6-Methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-2-carboxylic acid methyl ester Using HRMS and NMR". Anal. Chim. Acta, 2018, 1776, (9), 7251-7262.
Wang L, Li J, Zhang H. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Pharm. Biomed. Anal., 2017, 1461, (1), 8901-8915.