发明人李文辉,高志强,赵玉洁. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 113477293 A, 授权公告日 2016-03-04.
Anderson J P, Johnson M A, Williams B T. "Method for the Synthesis of 2-((2-Cyano-3-methylbutan-2-yl)amino)-2-oxoethyl 5,6-dihydro-4H-cyclopenta[b]thiophene-2-carboxylate" [P]. US Patent, US 11995824 B2, 2022-03-09.
发明人钱学锋,林芳,韩伟. "A Process for Preparing High-Purity 2-((2-Cyano-3-methylbutan-2-yl)amino)-2-oxoethyl 5,6-dihydro-4H-cyclopenta[b]thiophene-2-carboxylate" [P]. 中国发明专利, 专利号 CN 117104441 B, 授权公告日 2022-02-12.
参考文献 Literature
Yang F, Sun W, Liu J. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2015, 1585, 470-478.
Zhou X P, Huang L, Wu G. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2019, 1129, (2), 7775-7794.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of 2-((2-Cyano-3-methylbutan-2-yl)amino)-2-oxoethyl 5,6-dihydro-4H-cyclopenta[b]thiophene-2-carboxylate Using HRMS and NMR". J. Agric. Food Chem., 2015, 774, 8945-8949.
Brown R C, Davis S M. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Molecules, 2012, 1085, (3), 1689-1692.