Johnson M A, Patel M V, Fischer A B. "Method for the Synthesis of 4-(Difluoromethyl)-3-hydroxy-6-(trifluoromethyl)picolinic acid" [P]. US Patent, US 9958548 B2, 2016-11-05.
Schröder R, Martínez F, Sørensen M. "A Process for Preparing High-Purity 4-(Difluoromethyl)-3-hydroxy-6-(trifluoromethyl)picolinic acid" [P]. European Patent, EP 3719460 A1, 2023-10-28.
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". Sci. Total Environ., 2016, 99, (3), 9465-9483.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2021, 1309, (6), 8951-8964.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 4-(Difluoromethyl)-3-hydroxy-6-(trifluoromethyl)picolinic acid Using HRMS and NMR". J. Pharm. Biomed. Anal., 2014, 1723, 8820-8844.