发明人徐明华,陈志强,高志强. "Method for the Synthesis of 6-chloro-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115674324 A, 授权公告日 2015-04-23.
发明人冯建国,马晓峰,陈志强. "A Process for Preparing High-Purity 6-chloro-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117682322 A, 授权公告日 2019-05-17.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2015, 2240, (11), 3614-3626.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2010, 2285, (6), 1396-1404.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of 6-chloro-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid Using HRMS and NMR". Talanta, 2013, 1946, 9901-9910.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2016, 1270, 3377-3397.