Flumequine-13C3 (Synonyms: (±)-Flumequine-13C3, R-802-13C3)

Flumequine-¹³C₃ is intended for use as an internal standard for the quantification of flumequine by GC- or LC-MS. Flumequine is a fluoroquinolone antibiotic.¹ It is active against S. aureus, S. pyogenes, B. subtilis, E. coli, P. aeruginosa, S. faecalis, and K. pneumoniae (MICs = 1-100 µg/ml). Flumequine is also active against field isolates of B. hyodysenteriae (MICs = 6.25-200 µg/ml).² It inhibits DNA gyrase, disrupting supercoiling of bacterial DNA to block transcription and replication.³ In vivo, flumequine (50 mg/kg) increases survival in rat models of P. vulgaris-induced urinary tract infection and P. mirabilis-induced prostatitis.¹ Formulations containing flumequine have been used in the treatment of urinary tract infections in veterinary medicine.

1.Rohlfing, S.R., Gerster, J.R., and Kvam, D.C.Bioevaluation of the antibacterial flumequine for urinary tract useAntimicrob. Agents Chemother.10(1)20-24(1976) 2.Aller-MorÁn, L.M., MartÍnez-Lobo, F.J., Rubio, P., et al.Evaluation of the in vitro activity of flumequine against field isolates of Brachyspira hyodysenteriaeRes. Vet. Sci.10351-53(2015) 3.Smith, J.T.The mode of action of 4-quinolones and possible mechanisms of resistanceJ. Antimicrob. Chemother.18 (Suppl. D)21-29(1986)