An aminomethylcycline antibiotic; active against tetracycline-susceptible and -resistant strains of S. aureus, E. faecalis, E. faecium, S. pneumoniae, and E. coli, as well as β-hemolytic streptococci (MICs = ≤0.06-2 UG/ml); efficacious in mouse models of systemic infection with tetracycline-sensitive and -resistant strains of S. pneumoniae, S. aureus, or E. coli (ED50s = 0.3-3.34 mg/kg)