发明人赵玉洁,郑宇鹏,马晓峰. "Method for the Synthesis of 6,7-Dimethoxy-2-(thiophen-2-yl)-4H-3,1-benzoxazin-4-one" [P]. 中国发明专利, 专利号 CN 108976601 B, 授权公告日 2024-06-07.
发明人马晓峰,郑宇鹏,高志强. "A Process for Preparing High-Purity 6,7-Dimethoxy-2-(thiophen-2-yl)-4H-3,1-benzoxazin-4-one" [P]. 中国发明专利, 专利号 CN 110392729 B, 授权公告日 2024-11-04.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2016, 2430, 800-820.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chem., 2014, 1596, (11), 2467-2497.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 6,7-Dimethoxy-2-(thiophen-2-yl)-4H-3,1-benzoxazin-4-one Using HRMS and NMR". J. Agric. Food Chem., 2024, 519, 256-262.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2010, 1943, (4), 7809-7836.