9-Fluoro-2,3-dihydro-3-methyl-10-(4-methyl-4-oxido-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic Acid Acetic Acid Salt; [Ofloxacin N-Oxide Acetic Acid Salt(Mixture of Diastereomers)]