发明人王建平,黄志刚,胡光. "Method for the Synthesis of 6-Methyl-1-[(4-methylphenyl)methyl]-1h-pyrazolo[3,4-b]pyridine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115309212 B, 授权公告日 2021-12-13.
发明人杨光,高志强,郑宇鹏. "A Process for Preparing High-Purity 6-Methyl-1-[(4-methylphenyl)methyl]-1h-pyrazolo[3,4-b]pyridine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108738349 B, 授权公告日 2023-04-10.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chemosphere, 2021, 744, (5), 6833-6838.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2017, 1923, (2), 1886-1890.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of 6-Methyl-1-[(4-methylphenyl)methyl]-1h-pyrazolo[3,4-b]pyridine-4-carboxylic acid Using HRMS and NMR". J. Chromatogr. A, 2012, 400, (10), 2936-2955.