发明人高志强,朱建伟,何建平. "Method for the Synthesis of (E)-4-oxo-4-(3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)but-2-enoic acid" [P]. 中国发明专利, 专利号 CN 114687674 A, 授权公告日 2022-11-21.
Sørensen M, Mueller T C, Schröder R. "A Process for Preparing High-Purity (E)-4-oxo-4-(3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)but-2-enoic acid" [P]. European Patent, EP 3871633 A1, 2017-07-25.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2017, 2060, (1), 5801-5812.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2015, 632, (7), 4432-4442.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of (E)-4-oxo-4-(3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)but-2-enoic acid Using HRMS and NMR". Chromatographia, 2017, 569, 6408-6437.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2020, 709, (6), 3310-3324.