N-desmethyl Levofloxacin is an active metabolite of the fluoroquinolone antibiotic levofloxacin (Item No. 20382).1 It is active against S. aureus, S. epidermidis, B. subtilis, E. coli, P. aeruginosa, and K. pneumoniae (MICs = 4, 1, 1, 0.012, >4, and 0.25 μg/ml, respectively).WARNING This product is not for human or veterinary use.