Synonyms: 1-cyclopropyl-6-fluoro-7-[(1S,4S)-3-methyl-3,6-diazabicyclo[2.2.1]hept-6-yl]-4-oxo-quinoline-3-carboxylic acid; methanesulfonic acid;Danofloxacin mesylate [USAN];1-Cyclopropyl-6-fluoro-1,4-dihydro-7-((1S,4S)-5-methyl-2,5-diazabicyclo(2.2.1)hept-2-yl)-4-oxo-3-quinolinecarboxylic acid, monomethanesulfonate;3-Quinolinecarboxylic acid, 1-cyclopropyl-6-fluoro-1,4-dihydro-7-(5-methyl-2,5-diazabicyclo(2.2.1)hept-2-yl)-4-oxo-, (1S)-, monomethanesulfonate;Danofloxacin monomethanesulfonate;3-Quinolinecarboxylic acid,1-cyclopropyl-6-fluoro-1,4-dihydro-7- [(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]hept- 2-yl]-4-oxo-,monomethanesulfonate;