1,4-Dihydro-1-ethyl-4-oxo-7-(1H-pyrrol-1-yl)-3-quinolinecarboxylic acid 3-Quinolinecarboxylic acid, 1,4-dihydro-1-ethyl-4-oxo-7-(1H-pyrrol-1-yl)- 7-(1-Pyrrolyl)-1-ethyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid 93906-65-1 Piroxacin