发明人何建平,赵玉洁,唐晓军. "Method for the Synthesis of 1-methyl-4-(2-thienyl)-1{H}-pyrazolo[3,4-{b}]pyridine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116463489 A, 授权公告日 2025-02-14.
Rossi M, Mueller T C, Sørensen M. "A Process for Preparing High-Purity 1-methyl-4-(2-thienyl)-1{H}-pyrazolo[3,4-{b}]pyridine-3-carboxylic acid" [P]. European Patent, EP 3446116 A1, 2024-12-03.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of 1-methyl-4-(2-thienyl)-1{H}-pyrazolo[3,4-{b}]pyridine-3-carboxylic acid in Pharmaceutical Formulations". Food Chem., 2011, 1493, 5535-5553.
Jensen P, Larsen A M, Olsen K. "A Stability-Indicating HPLC Method for the Separation and Quantification of 1-methyl-4-(2-thienyl)-1{H}-pyrazolo[3,4-{b}]pyridine-3-carboxylic acid as an Impurity". J. Chromatogr. A, 2024, 1179, 5410-5435.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 1-methyl-4-(2-thienyl)-1{H}-pyrazolo[3,4-{b}]pyridine-3-carboxylic acid Using HRMS and NMR". Anal. Chem., 2025, 259, 6459-6478.