Levofloxacin EP Impurity B

Chemical Name: (-)-(S)-9-Fluoro-2,3-dihydro-3-methyl-10-(1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid ; (3S)-9-fluoro-3-methyl-7-oxo-10-(piperazin-1-yl)-2,3-dihydro-7H-pyrido-[1,2,3-de] [1,4]benzoxazine-6-carboxylic acid

Synonym:  Levofloxacin USP Related Compound A ; N-Desmethyl Levofloxacin ; Piperazine Impurity

Smile: O=C1C2=CC(F)=C(N3CCNCC3)C(OC[C@@H]4C)=C2N4C=C1C(O)=O