NFX50: Norfloxacin N-Hydroxy Impurity

1-Ethyl-6-fluoro-1,4-dihydro-7-(4-hydroxy-1-piperazinyl)-4-oxo-3-quinolinecarboxylic acid ; 

CAS # 109142-49-6 ;

C16H18FN3O4 ;
Mol. Wt.: 335.33 ;