发明人赵玉洁,钱学锋,郑宇鹏. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 116142712 A, 授权公告日 2020-03-18.
发明人周伟,刘建华,郭海燕. "Method for the Synthesis of 6-(Tert-butyl) 4-ethyl 2-(methylthio)-7,8-dihydropyrido[4,3-d]pyrimidine-4,6(5H)-dicarboxylate" [P]. 中国发明专利, 专利号 CN 111689895 B, 授权公告日 2025-10-16.
发明人陈志强,杨光,徐明华. "A Process for Preparing High-Purity 6-(Tert-butyl) 4-ethyl 2-(methylthio)-7,8-dihydropyrido[4,3-d]pyrimidine-4,6(5H)-dicarboxylate" [P]. 中国发明专利, 专利号 CN 117458246 B, 授权公告日 2023-04-16.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chemosphere, 2011, 338, 3584-3591.
Zhou X P, Huang L, Wu G. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2023, 1123, 3274-3303.