Patel M V, Davis P L, Park J H. "一种6-cyclopropyl-1-(2-hydroxyethyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid的合成方法" [P]. US Patent, US 10329372 B2, 2015-10-26.
发明人马晓峰,高志强,赵玉洁. "Method for the Synthesis of 6-cyclopropyl-1-(2-hydroxyethyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110741086 B, 授权公告日 2016-03-16.
Hughes D C, Thompson G K, Lee S K. "A Process for Preparing High-Purity 6-cyclopropyl-1-(2-hydroxyethyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid" [P]. US Patent, US 10271489 B2, 2015-07-18.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of 6-cyclopropyl-1-(2-hydroxyethyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid in Pharmaceutical Formulations". Talanta, 2024, 860, (6), 3157-3182.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of 6-cyclopropyl-1-(2-hydroxyethyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid as an Impurity". Molecules, 2024, 2138, (12), 2202-2214.