Schröder R, Jørgensen K, Nielsen H. "Method for the Synthesis of Methyl 4-chloro-2-(3,4-dimethoxybenzyl)-5-methylthieno[2,3-d]pyrimidine-6-carboxylate" [P]. European Patent, EP 3428148 A1, 2020-04-06.
发明人王建平,高志强,赵玉洁. "A Process for Preparing High-Purity Methyl 4-chloro-2-(3,4-dimethoxybenzyl)-5-methylthieno[2,3-d]pyrimidine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 116874989 B, 授权公告日 2025-10-02.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2014, 1548, (8), 7483-7511.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2010, 840, (6), 4307-4319.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Methyl 4-chloro-2-(3,4-dimethoxybenzyl)-5-methylthieno[2,3-d]pyrimidine-6-carboxylate Using HRMS and NMR". Talanta, 2024, 1974, 5507-5536.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chromatographia, 2024, 564, (2), 1591-1614.