1H-Pyrazolo[3,4-b]pyridine-4-carboxylic acid, 6,7-dihydro-3-methyl-1-(1-methylethyl)-6-oxo-
6,7-Dihydro-3-methyl-1-(1-methylethyl)-6-oxo-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid
1-Isopropyl-3-methyl-6-oxo-6,7-dihydro-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid
3-Methyl-6-oxo-1-(propan-2-yl)-1H,6H,7H-pyrazolo[3,4-b]pyridine-4-carboxylic acid