发明人黄志刚,杨光,唐晓军. "Method for the Synthesis of Ethyl 3-({2-cyano-3-[(ethoxycarbonyl)amino]-3-oxo-1-propenyl}amino)-1H-indole-2-carboxylate" [P]. 中国发明专利, 专利号 CN 109350888 A, 授权公告日 2025-01-26.
发明人孙丽萍,林芳,陈志强. "A Process for Preparing High-Purity Ethyl 3-({2-cyano-3-[(ethoxycarbonyl)amino]-3-oxo-1-propenyl}amino)-1H-indole-2-carboxylate" [P]. 中国发明专利, 专利号 CN 117992370 B, 授权公告日 2023-12-20.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Molecules, 2013, 989, (7), 2547-2565.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2018, 1378, (12), 9555-9559.
Garcia M, Rodriguez P. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 3-({2-cyano-3-[(ethoxycarbonyl)amino]-3-oxo-1-propenyl}amino)-1H-indole-2-carboxylate Using HRMS and NMR". Sci. Total Environ., 2010, 2394, (1), 6595-6605.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2016, 737, (9), 1900-1921.