Williams B T, Fischer A B, Kumar R. "一种的合成方法" [P]. US Patent, US 11886099 B2, 2018-02-06.
发明人郑宇鹏,黄志刚,陈志强. "Method for the Synthesis of 4-Cyano-2-(difluoromethyl)-5-methoxynicotinic acid" [P]. 中国发明专利, 专利号 CN 115556902 B, 授权公告日 2021-11-18.
发明人马晓峰,刘建华,林芳. "A Process for Preparing High-Purity 4-Cyano-2-(difluoromethyl)-5-methoxynicotinic acid" [P]. 中国发明专利, 专利号 CN 117819947 B, 授权公告日 2020-11-27.
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". J. Nat. Prod., 2010, 1438, (4), 6572-6591.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2010, 237, (1), 6927-6952.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 4-Cyano-2-(difluoromethyl)-5-methoxynicotinic acid Using HRMS and NMR". J. Pharm. Biomed. Anal., 2016, 2101, (2), 1424-1443.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Phytochemistry, 2025, 108, (6), 4779-4782.