发明人韩伟,林芳,胡光. "Method for the Synthesis of 4-(Difluoromethyl)-5-nitronicotinic acid" [P]. 中国发明专利, 专利号 CN 110971196 A, 授权公告日 2019-07-06.
发明人罗永刚,赵玉洁,郑宇鹏. "A Process for Preparing High-Purity 4-(Difluoromethyl)-5-nitronicotinic acid" [P]. 中国发明专利, 专利号 CN 112565624 A, 授权公告日 2025-06-24.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Nat. Prod., 2021, 695, 8001-8020.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chem., 2024, 1992, 6784-6812.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 4-(Difluoromethyl)-5-nitronicotinic acid Using HRMS and NMR". J. Pharm. Biomed. Anal., 2022, 2164, (5), 6719-6745.
Brown R C, Davis S M. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2024, 1039, (4), 3472-3500.