Davis P L, Williams B T, Patel M V. "一种6-cyclopropyl-1-(1-cyclopropylethyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid的合成方法" [P]. US Patent, US 11128323 B2, 2015-10-25.
发明人周伟,胡光,赵玉洁. "Method for the Synthesis of 6-cyclopropyl-1-(1-cyclopropylethyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113699188 A, 授权公告日 2018-08-24.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of 6-cyclopropyl-1-(1-cyclopropylethyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid in Pharmaceutical Formulations". Anal. Methods, 2011, 1780, (7), 9803-9821.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of 6-cyclopropyl-1-(1-cyclopropylethyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid as an Impurity". Rapid Commun. Mass Spectrom., 2010, 782, (10), 690-708.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 6-cyclopropyl-1-(1-cyclopropylethyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid Using HRMS and NMR". Environ. Sci. Technol., 2022, 179, 3108-3114.