(Rac) -Moxifloxacin ((Rac) -BAY 12-8039 free base) is the isoform of Moxifloxacin Hydrochloride , which is an oral 8-methoxyquinolone antimicrobial for use in the treatment of acute bacterial sinusitis, acute bacterial exacerbations of chronic bronchitis, and community-acquired pneumonia[1][2].