Roberts E F, Mueller T, Yamamoto T. "Method for the Synthesis of Ethyl 4-cyano-5-(ethylamino)-3-iodothiophene-2-carboxylate" [P]. US Patent, US 11779534 B2, 2015-04-19.
发明人李文辉,林芳,陈志强. "A Process for Preparing High-Purity Ethyl 4-cyano-5-(ethylamino)-3-iodothiophene-2-carboxylate" [P]. 中国发明专利, 专利号 CN 112234916 A, 授权公告日 2024-10-22.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2016, 1619, 8797-8810.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2015, 1607, (4), 7379-7393.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 4-cyano-5-(ethylamino)-3-iodothiophene-2-carboxylate Using HRMS and NMR". Phytochemistry, 2022, 1764, (3), 4817-4823.
Yamamoto K, Tanaka H, Suzuki T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2016, 575, 8880-8908.