发明人韩伟,徐明华,沈红梅. "Method for the Synthesis of Ethyl 2-[(3,4-dimethoxyphenyl)methyl]-5-methyl-4-oxo-3h,4h-thieno[2,3-d]pyrimidine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 116635584 A, 授权公告日 2016-05-12.
发明人郑宇鹏,胡光,钱学锋. "A Process for Preparing High-Purity Ethyl 2-[(3,4-dimethoxyphenyl)methyl]-5-methyl-4-oxo-3h,4h-thieno[2,3-d]pyrimidine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 108079169 A, 授权公告日 2023-01-10.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Phytochemistry, 2025, 2271, (4), 7747-7754.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2015, 1795, (11), 5156-5159.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 2-[(3,4-dimethoxyphenyl)methyl]-5-methyl-4-oxo-3h,4h-thieno[2,3-d]pyrimidine-6-carboxylate Using HRMS and NMR". Talanta, 2020, 851, 4701-4710.