all strains were sensitive to the semisynthetic penicillins ampicillin , carbenicillin , oxacillin , cloxacillin , and methicillin , but 10 of the 13 strains were resistant to penicillin g , as well as a number of cephalosporins , such as cephalothin , cephapirin , and cephalosporin c .
C0006976
carbenicillin
C0030827
penicillin g