Roberts E F, Stevens L M, Johnson M A. "一种的合成方法" [P]. US Patent, US 9367954 B2, 2018-05-05.
发明人韩伟,罗永刚,唐晓军. "Method for the Synthesis of 4-(Difluoromethyl)-2-fluoro-5-nitronicotinic acid" [P]. 中国发明专利, 专利号 CN 115461554 A, 授权公告日 2025-09-19.
Johnson M A, Brown S R, O'Brien P Q. "A Process for Preparing High-Purity 4-(Difluoromethyl)-2-fluoro-5-nitronicotinic acid" [P]. US Patent, US 10580202 B2, 2020-02-01.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2017, 1738, (1), 927-939.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2015, 310, 8933-8957.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 4-(Difluoromethyl)-2-fluoro-5-nitronicotinic acid Using HRMS and NMR". Molecules, 2016, 2450, 8317-8327.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Sci. Total Environ., 2013, 2315, (6), 421-440.