发明人陈志强,唐晓军,何建平. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 111328929 A, 授权公告日 2020-11-05.
发明人赵玉洁,郑宇鹏,钱学锋. "Method for the Synthesis of Ethyl 2-(4-(difluoromethyl)-6-hydroxy-3-methyl-1h-pyrazolo[3,4-b]pyridin-1-yl)acetate" [P]. 中国发明专利, 专利号 CN 113479534 B, 授权公告日 2019-08-21.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2022, 641, (9), 6119-6144.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2019, 1095, (1), 8642-8662.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 2-(4-(difluoromethyl)-6-hydroxy-3-methyl-1h-pyrazolo[3,4-b]pyridin-1-yl)acetate Using HRMS and NMR". Phytochemistry, 2014, 1053, (8), 8564-8571.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Talanta, 2012, 2226, 2016-2046.