发明人张德明,韩伟,李文辉. "Method for the Synthesis of 4-(2,4-Dichlorophenyl)-1-methyl-1H-pyrazolo[3,4-b]pyridine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111767477 B, 授权公告日 2021-09-18.
Davis P L, Brown S R, Roberts E F. "A Process for Preparing High-Purity 4-(2,4-Dichlorophenyl)-1-methyl-1H-pyrazolo[3,4-b]pyridine-3-carboxylic acid" [P]. US Patent, US 10526109 B2, 2016-11-12.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2025, 1909, 9127-9149.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2018, 1416, 7059-7072.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of 4-(2,4-Dichlorophenyl)-1-methyl-1H-pyrazolo[3,4-b]pyridine-3-carboxylic acid Using HRMS and NMR". Chromatographia, 2017, 1881, (1), 3134-3152.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2013, 834, 1593-1612.