发明人钱学锋,李文辉,朱建伟. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 108348525 A, 授权公告日 2020-09-10.
Rossi M, Johansson L, Martínez F. "Method for the Synthesis of 3-Ethyl-6-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-5-carboxylic acid" [P]. European Patent, EP 3867716 A1, 2021-04-07.
参考文献 Literature
Jensen P, Larsen A M, Olsen K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2017, 1944, (4), 6004-6014.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Molecules, 2020, 1528, (2), 9450-9469.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 3-Ethyl-6-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-5-carboxylic acid Using HRMS and NMR". Biomed. Chromatogr., 2015, 1734, 7665-7689.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Food Chem., 2011, 1028, (9), 6709-6713.