发明人杨光,赵玉洁,张德明. "Method for the Synthesis of 4-Amino-5-chloro-2-(difluoromethyl)nicotinic acid" [P]. 中国发明专利, 专利号 CN 116419339 B, 授权公告日 2020-09-23.
Roberts E F, Park J H, Hughes D C. "A Process for Preparing High-Purity 4-Amino-5-chloro-2-(difluoromethyl)nicotinic acid" [P]. US Patent, US 9532244 B2, 2024-12-09.
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., 2015, 1787, 1632-1641.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2019, 762, (4), 125-136.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of 4-Amino-5-chloro-2-(difluoromethyl)nicotinic acid Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2024, 1321, (6), 594-604.