Levofloxacin EP Impurity D

: Levofloxacin Desfluoro Impurity; Levofloxacin USP Related Compound F; Defluoro Levofloxacin; (-)-(S)-2,3-Dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid;