Roberts E F, Mueller T, Lee S K. "Method for the Synthesis of 1-Ethyl-6,7-dimethoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid" [P]. US Patent, US 9541780 B2, 2015-04-12.
发明人唐晓军,郑宇鹏,黄志刚. "A Process for Preparing High-Purity 1-Ethyl-6,7-dimethoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115211300 B, 授权公告日 2019-02-07.
参考文献 Literature
Yang F, Sun W, Liu J. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2014, 86, (7), 3383-3413.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2022, 2159, (10), 6565-6587.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of 1-Ethyl-6,7-dimethoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid Using HRMS and NMR". Food Chem., 2011, 1860, (11), 1269-1295.