Ofloxacin-d8 (hydrochloride) (Synonyms: Hoe-280-d8 hydrochloride)

Ofloxacin-d₈ is intended for use as an internal standard for the quantification of ofloxacin by GC- or LC-MS. Ofloxacin is a broad-spectrum fluoroquinolone antibiotic that prevents supercoiling of bacterial chromosomes by DNA gyrase.^1,2 It is active against Gram-positive and Gram-negative bacteria with MIC₉₀s ranging from 0.39 to 3.13 μg/ml for clinical isolates of S. aureus, S. epidermidis, S. pyogenes, and S. faecalis and ≤0.78 μg/ml for N. gonorrhoeae and various species of Enterobacteriaceae. Ofloxacin is active in vivo, with ED₅₀ values ranging from 0.7 to 75.1 mg/kg in infected mice. Formulations containing ofloxacin have been used to treat urinary tract infections, gonorrhea, prostatitis, and gastroenteritis.

1.Sato, K., Matsuura, Y., Inoue, M., et al.In vitro and in vivo activity of DL-8280, a new oxazine derivativeAntimicrob. Agents and Chemother.22(4)548-553(1982) 2.Smith, J.T.The mode of action of 4-quinolones and possible mechanisms of resistanceJ. Antimicrob. Chemother.18 (Suppl. D)21-29(1986)