Hughes D C, Stevens L M, Mueller T. "Method for the Synthesis of ethyl 6-methoxy-3-methyl-benzofuran-2-carboxylate" [P]. US Patent, US 10224154 B2, 2022-10-22.
发明人林芳,孙丽萍,韩伟. "A Process for Preparing High-Purity ethyl 6-methoxy-3-methyl-benzofuran-2-carboxylate" [P]. 中国发明专利, 专利号 CN 111463886 A, 授权公告日 2022-11-10.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2011, 2261, (8), 7348-7369.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2017, 890, (4), 8807-8832.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of ethyl 6-methoxy-3-methyl-benzofuran-2-carboxylate Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2012, 1885, 9289-9307.
Kumar A, Sharma P, Patel R S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chromatographia, 2021, 483, (7), 8434-8459.