Fluorinated quinolone antibacterial. Prepn: M. Aoki et al., EP 259804; K. Yokose et al., US 4801584 (1987, 1989 both to Hoffmann-LaRoche). HPLC determn in plasma: M. A. Garcia et al., J. Chromatogr. B 729, 157 (1999). Evaluation of experimental surgical infection in dogs: P. Gruet et al., Vet. Rec. 140, 199 (1997). Pharmacokinetics and efficacy in cattle: C. Eyett-Burton et al., Cattle Practice 5, 289 (1997). Pharmacokinetics in renally impaired dogs: H. P. Lefebvre et al., J. Vet. Pharmacol. Ther. 21, 453 (1998).