发明人孙丽萍,刘建华,冯建国. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 116627766 A, 授权公告日 2025-07-28.
发明人刘建华,何建平,陈志强. "Method for the Synthesis of 4-{[3-(dimethylamino)propyl]amino}-1-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110055999 B, 授权公告日 2017-02-17.
发明人周伟,高志强,唐晓军. "A Process for Preparing High-Purity 4-{[3-(dimethylamino)propyl]amino}-1-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116024142 A, 授权公告日 2018-07-28.
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". Anal. Chem., 2013, 1112, 37-54.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2019, 1588, (2), 4536-4554.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 4-{[3-(dimethylamino)propyl]amino}-1-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid Using HRMS and NMR". Anal. Methods, 2019, 2091, (3), 6999-7020.