1-Aethyl-3-carboxy-4-oxo-pyrazol(5,4-f)chinolin [German] 1-Ethyl-3-carboxy-4-oxo-pyrazolo(5,4-f)quinoline 1H-Pyrazolo(3,4-f)quinoline-8-carboxylic acid, 6,9-dihydro-6-ethyl-9-oxo- 6,9-Dihydro-6-ethyl-9-oxo-1H-pyrazolo(3,4-f)quinoline-8-carboxylic acid 65642-37-7 BRN 0892638