gatifloxacin [ 1-cyclopropyl-1,4-dihydro-6-fluoro-8-methoxy-7-(3-methyl-1-piperazinyl)-4-oxo-3-quinolinecarboxylic acid,AM 1155,AM-1155,BMS-206584,CG 5501,Tequin,Zymar,gatifloxacin, (+-)-isomer,gatifloxacine ] gatifloxacin is (+-)-isomer; structure in first source