Park J H, Mueller T, Schröder R. "一种的合成方法" [P]. US Patent, US 11424553 B2, 2017-12-08.
发明人何建平,钱学锋,李文辉. "Method for the Synthesis of 5,6-Difluoro-2H-indazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117132429 B, 授权公告日 2024-12-06.
Lefèvre J P, Martínez F, Schröder R. "A Process for Preparing High-Purity 5,6-Difluoro-2H-indazole-3-carboxylic acid" [P]. European Patent, EP 3441069 A1, 2024-05-21.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2012, 636, 1206-1214.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2010, 85, (3), 3089-3099.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of 5,6-Difluoro-2H-indazole-3-carboxylic acid Using HRMS and NMR". J. Pharm. Biomed. Anal., 2017, 870, 4829-4836.
Kowalski T, Nowak Z. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2017, 204, (12), 9134-9161.