Kumar R, Yamamoto T, Stevens L M. "一种的合成方法" [P]. US Patent, US 10288908 B2, 2019-03-02.
Hughes D C, Kumar R, Yamamoto T. "Method for the Synthesis of 2-(Difluoromethyl)-4-methoxy-3-nitropyridine-5-carboxylic acid" [P]. US Patent, US 10046890 B2, 2020-10-27.
发明人周伟,钱学锋,郭海燕. "A Process for Preparing High-Purity 2-(Difluoromethyl)-4-methoxy-3-nitropyridine-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109510380 A, 授权公告日 2020-10-05.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2019, 247, (7), 8237-8245.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2016, 756, (8), 2077-2097.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 2-(Difluoromethyl)-4-methoxy-3-nitropyridine-5-carboxylic acid Using HRMS and NMR". Anal. Methods, 2022, 1168, (8), 9149-9159.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2018, 368, (7), 9066-9074.