the antibacterial spectrum of roxithromycin and erythromycin were qualitatively comparable ( including the bacteriostatic type of activity and the profile of resistance ) , but minimal inhibitory concentrations of erythromycin were generally one half those of roxithromycin , except for corynebacterium sp . and bacteroides fragilis against which the new macrolide was more active .
C0014806
erythromycin
C0035891
roxithromycin