Benzoic acid, 5-[(3,4-dihydro-4-oxo-1-phthalazinyl)methyl]-2-fluoro-, 2-fluoro-5-((4-oxo-3,4-dihydrophthalazin-1-yl)Methyl), 5-[(3,4-Dihydro-4-oxo-1-phthalazinyl)methyl]-2-fluoro-Benzoic acid, 2-fluoro-5-((4-oxo-3,4-dihydrophthalazin-1-yl)Methyl)benzoic acid