The present invention relates to compounds of formula (I) which specifically inhibit bacterial DNA Gyrase and can be used for the treatment of respiratory tract infections caused by Staphylococcus species, Enterococcus species, Streptococcus species, Moraxella species, E.coli, Klebsiella species, Pseudomonas species or Acinetobacter species, in a mammalian subject.La présente invention concerne des composés qui inhibent particulièrement lADN gyrase bactérienne et peuvent être utilisés dans le traitement dinfections du tractus respiratoire.