of these agents , only cefotaxime demonstrated greater activity than penicillin against intermediate penicillin-resistant strains while cefoperazone , ceftriaxone , n-formimidoyl thienamycin and vancomycin as well as cefotaxime demonstrated activity superior to penicillin against penicillin-resistant strains .
C0007561
ceftriaxone
C0007554
cefotaxime