Thompson G K, Brown S R, Johnson M A. "一种的合成方法" [P]. US Patent, US 11127421 B2, 2022-04-14.
发明人杨光,何建平,马晓峰. "Method for the Synthesis of Benzyl 2-(methylthio)-4-oxo-4,5,6,8-tetrahydropyrido[3,4-d]pyrimidine-7(3H)-carboxylate" [P]. 中国发明专利, 专利号 CN 111538761 A, 授权公告日 2022-11-24.
发明人唐晓军,冯建国,孙丽萍. "A Process for Preparing High-Purity Benzyl 2-(methylthio)-4-oxo-4,5,6,8-tetrahydropyrido[3,4-d]pyrimidine-7(3H)-carboxylate" [P]. 中国发明专利, 专利号 CN 117480213 A, 授权公告日 2016-09-12.
参考文献 Literature
Yang F, Sun W, Liu J. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2012, 1515, (9), 1813-1838.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2018, 985, 4337-4342.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of Benzyl 2-(methylthio)-4-oxo-4,5,6,8-tetrahydropyrido[3,4-d]pyrimidine-7(3H)-carboxylate Using HRMS and NMR". J. Pharm. Biomed. Anal., 2016, 1095, (1), 2902-2905.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2013, 1713, (12), 9880-9892.