Fischer A B, Chen K W, Park J H. "Method for the Synthesis of 2,3,5,6-Tetrafluoro-4-methoxybenzoic acid" [P]. US Patent, US 11287452 B2, 2018-10-17.
Schröder R, Lefèvre J P, Nielsen H. "A Process for Preparing High-Purity 2,3,5,6-Tetrafluoro-4-methoxybenzoic acid" [P]. European Patent, EP 3270274 A1, 2020-06-03.
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". Phytochemistry, 2012, 1565, (3), 8965-8991.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chem., 2015, 2234, (9), 6963-6978.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 2,3,5,6-Tetrafluoro-4-methoxybenzoic acid Using HRMS and NMR". Molecules, 2014, 1763, (1), 5159-5165.