发明人沈红梅,周伟,唐晓军. "Method for the Synthesis of 1-(2-Fluoro-4-(1H-pyrazol-1-yl)phenyl)-5-methoxy-4-oxo-1,4-dihydropyridazine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116339537 B, 授权公告日 2017-04-14.
发明人张德明,钱学锋,周伟. "A Process for Preparing High-Purity 1-(2-Fluoro-4-(1H-pyrazol-1-yl)phenyl)-5-methoxy-4-oxo-1,4-dihydropyridazine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117778955 B, 授权公告日 2024-02-09.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2018, 312, (11), 9613-9628.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2015, 482, (9), 1920-1943.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of 1-(2-Fluoro-4-(1H-pyrazol-1-yl)phenyl)-5-methoxy-4-oxo-1,4-dihydropyridazine-3-carboxylic acid Using HRMS and NMR". Anal. Chem., 2019, 1021, (5), 9352-9360.