(S)-7-(3-((3-Carboxy-8-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)amino)azepan-1-yl)-8-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic Acid