Klinger H, Anderson J P, Park J H. "Method for the Synthesis of Ethyl 5-methyl-2-[(4-methylpiperidin-1-yl)methyl]-4-oxo-3h,4h-thieno[2,3-d]pyrimidine-6-carboxylate" [P]. US Patent, US 10532855 B2, 2025-06-25.
发明人王建平,罗永刚,胡光. "A Process for Preparing High-Purity Ethyl 5-methyl-2-[(4-methylpiperidin-1-yl)methyl]-4-oxo-3h,4h-thieno[2,3-d]pyrimidine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 108474449 B, 授权公告日 2024-05-26.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2010, 646, (6), 3125-3154.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2010, 876, (5), 2257-2263.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 5-methyl-2-[(4-methylpiperidin-1-yl)methyl]-4-oxo-3h,4h-thieno[2,3-d]pyrimidine-6-carboxylate Using HRMS and NMR". J. Sep. Sci., 2023, 1970, (3), 6710-6713.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2015, 329, 3770-3796.