发明人张德明,杨光,黄志刚. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 117940957 A, 授权公告日 2019-10-15.
发明人周伟,罗永刚,赵玉洁. "Method for the Synthesis of 4-Chloro-5-(difluoromethyl)-6-hydroxynicotinic acid" [P]. 中国发明专利, 专利号 CN 114878040 A, 授权公告日 2023-03-07.
发明人沈红梅,孙丽萍,李文辉. "A Process for Preparing High-Purity 4-Chloro-5-(difluoromethyl)-6-hydroxynicotinic acid" [P]. 中国发明专利, 专利号 CN 115502811 A, 授权公告日 2021-01-27.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chemosphere, 2021, 496, (7), 4474-4491.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2017, 1330, (12), 3867-3893.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 4-Chloro-5-(difluoromethyl)-6-hydroxynicotinic acid Using HRMS and NMR". Anal. Methods, 2021, 873, 4567-4571.