Johansson L, Nowak P, Sørensen M. "一种的合成方法" [P]. European Patent, EP 3736218 A1, 2021-10-21.
Chen K W, Lee S K, Park J H. "Method for the Synthesis of 5-Ethoxy-2,4-difluorobenzoic acid" [P]. US Patent, US 10805950 B2, 2021-12-18.
Nielsen H, Jørgensen K, Kowalski A. "A Process for Preparing High-Purity 5-Ethoxy-2,4-difluorobenzoic acid" [P]. European Patent, EP 3769096 A1, 2018-12-19.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Methods, 2016, 2178, (8), 4250-4271.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Molecules, 2014, 2055, (4), 1221-1248.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 5-Ethoxy-2,4-difluorobenzoic acid Using HRMS and NMR". J. Pharm. Biomed. Anal., 2014, 993, 534-545.