Davis P L, Patel M V, O'Brien P Q. "一种的合成方法" [P]. US Patent, US 9001112 B2, 2019-07-10.
Kumar R, Brown S R, Roberts E F. "Method for the Synthesis of 6-Chloro-1-methyl-pyrazolo[3,4-b]pyridine-3-carbonitrile" [P]. US Patent, US 10487894 B2, 2023-10-26.
Johnson M A, Anderson J P, Brown S R. "A Process for Preparing High-Purity 6-Chloro-1-methyl-pyrazolo[3,4-b]pyridine-3-carbonitrile" [P]. US Patent, US 11947202 B2, 2025-06-17.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2012, 992, (5), 5674-5683.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2011, 1952, (3), 4544-4548.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of 6-Chloro-1-methyl-pyrazolo[3,4-b]pyridine-3-carbonitrile Using HRMS and NMR". Chromatographia, 2022, 1502, (5), 7056-7060.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Talanta, 2010, 773, (12), 7694-7708.