Chen K W, Fischer A B, Schröder R. "Method for the Synthesis of 4-{5-ethyl-6-methyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidin-2-yl}benzoic acid" [P]. US Patent, US 10900774 B2, 2025-05-13.
发明人朱建伟,罗永刚,王建平. "A Process for Preparing High-Purity 4-{5-ethyl-6-methyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidin-2-yl}benzoic acid" [P]. 中国发明专利, 专利号 CN 113076319 B, 授权公告日 2018-04-17.
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". J. Nat. Prod., 2022, 960, 6406-6415.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2019, 1679, (1), 9446-9475.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of 4-{5-ethyl-6-methyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidin-2-yl}benzoic acid Using HRMS and NMR". Chromatographia, 2023, 1848, 8508-8533.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2015, 1897, (12), 9788-9814.