Roberts E F, Brown S R, Anderson J P. "一种的合成方法" [P]. US Patent, US 10834210 B2, 2019-05-04.
发明人黄志刚,王建平,沈红梅. "Method for the Synthesis of Ethyl 2-(methylamino)-4-oxo-4,5-dihydrothiophene-3-carboxylate" [P]. 中国发明专利, 专利号 CN 112074329 A, 授权公告日 2025-06-17.
发明人徐明华,赵玉洁,周伟. "A Process for Preparing High-Purity Ethyl 2-(methylamino)-4-oxo-4,5-dihydrothiophene-3-carboxylate" [P]. 中国发明专利, 专利号 CN 116048515 B, 授权公告日 2025-12-23.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2011, 237, (7), 5003-5021.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2022, 715, (8), 6975-7002.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 2-(methylamino)-4-oxo-4,5-dihydrothiophene-3-carboxylate Using HRMS and NMR". J. Sep. Sci., 2010, 1896, 7886-7903.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2014, 723, 8937-8944.