Ciprofloxacin Hydrochloride Impurity - F

1-Cyclopropyl-6-hydroxy-4-oxo-7-(piperazin-1-yl)-1,4-dihydroquinoline-3-carboxylic Acid; 
6-Hydroxy-6-defluoro Ciprofloxacin; 1-Cyclopropyl-1,4-dihydro-6-hydroxy-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic Acid;