this agent acts synergistically with many penicillins , such as ampicillin , carbenicillin , and the like , and with cephalosporins , cefazolin , cefamandole , or cefoxitin to inhibit gram-negative bacilli , probably on the basis of binding to different proteins needed for the production of the peptidoglycan of the bacterial cell wall .
C3536856
cephalosporins
C0007557
cefoxitin