Mueller T C, Martínez F, Sørensen M. "Method for the Synthesis of 6-(4-Methoxyphenyl)-1-methyl-1h-pyrazolo[3,4-b]pyridine-4-carboxylic acid" [P]. European Patent, EP 3570909 A1, 2020-02-17.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Methods, 2014, 1247, (10), 9233-9251.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2012, 2347, 1715-1724.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 6-(4-Methoxyphenyl)-1-methyl-1h-pyrazolo[3,4-b]pyridine-4-carboxylic acid Using HRMS and NMR". Sci. Total Environ., 2018, 1484, 6949-6970.