2,2-Diacetoxy-6-cyclopropyl-8,9-difluoro-10-methyl-4-oxo-4,6-dihydro-2H-[1,3,2]dioxaborinino[5,4-c]quinolin-1-ium-2-uide is an intermediate in the synthesis of dl-Grepafloxacin (G783000), which is an antibacterial compound used to treat various respirator infections.