Kumar R, Park J H, Brown S R. "一种的合成方法" [P]. US Patent, US 9565955 B2, 2020-04-04.
Kumar R, Klinger H, Johnson M A. "Method for the Synthesis of 6-(Ethyl(methyl)amino)-5-methylnicotinic acid" [P]. US Patent, US 11777282 B2, 2020-05-25.
Kowalski A, Nielsen H, Jørgensen K. "A Process for Preparing High-Purity 6-(Ethyl(methyl)amino)-5-methylnicotinic acid" [P]. European Patent, EP 3668112 A1, 2022-11-24.
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". Phytochemistry, 2016, 931, (2), 520-528.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2019, 1688, 8527-8552.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of 6-(Ethyl(methyl)amino)-5-methylnicotinic acid Using HRMS and NMR". Biomed. Chromatogr., 2018, 259, (8), 5208-5227.