发明人林芳,杨光,黄志刚. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 115756198 A, 授权公告日 2017-10-24.
Johnson M A, Kumar R, Thompson G K. "Method for the Synthesis of 6-Heptyl-1-isopropyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid" [P]. US Patent, US 10823063 B2, 2019-05-02.
Yamamoto T, Klinger H, Kumar R. "A Process for Preparing High-Purity 6-Heptyl-1-isopropyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid" [P]. US Patent, US 11306708 B2, 2017-08-17.
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". Sci. Total Environ., 2010, 2254, (11), 613-620.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2019, 920, (11), 9498-9523.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of 6-Heptyl-1-isopropyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid Using HRMS and NMR". Anal. Chem., 2014, 210, 5146-5158.
O'Brien K, Kennedy M L. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2013, 472, (10), 1620-1632.