发明人何建平,唐晓军,郑宇鹏. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 109055711 A, 授权公告日 2023-08-03.
Stevens L M, Fischer A B, Williams B T. "Method for the Synthesis of Methyl 1-(2-cyanoethyl)-3,6-dimethyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate" [P]. US Patent, US 10262154 B2, 2020-11-20.
发明人郭海燕,钱学锋,黄志刚. "A Process for Preparing High-Purity Methyl 1-(2-cyanoethyl)-3,6-dimethyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate" [P]. 中国发明专利, 专利号 CN 115898041 A, 授权公告日 2024-11-23.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2019, 1440, 9981-9997.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2023, 1700, (6), 1654-1668.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of Methyl 1-(2-cyanoethyl)-3,6-dimethyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate Using HRMS and NMR". J. Chromatogr. A, 2015, 1455, (4), 8376-8403.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2025, 220, (11), 4980-4993.