Johansson L, Nowak P, Sørensen M. "Method for the Synthesis of 4-(Difluoromethyl)-2-isopropyl-3-methyl-2h-pyrazolo[3,4-b]pyridin-6-ol" [P]. European Patent, EP 3075074 A1, 2018-01-23.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2016, 2035, 6853-6864.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2015, 1900, (11), 8340-8346.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 4-(Difluoromethyl)-2-isopropyl-3-methyl-2h-pyrazolo[3,4-b]pyridin-6-ol Using HRMS and NMR". J. Pharm. Biomed. Anal., 2018, 1794, 3959-3970.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Molecules, 2024, 1457, 6921-6935.