the alpha-carboxy-penicillins ( carbenicillin and ticarcillin ) , the acylureidopenicillins ( piperacillin and azlocillin ) and cephalosporins ( moxalactam , cefoperazone , cefsulodin and ceftazidime ) were used as the selective antibiotics .
C0030842
penicillins
C0031955
piperacillin