in vitro activity against aztreonam was compared with amikacin , ampicillin , carbenicillin , cephalosporin , cefoxitin , chloramphenicol , gentamicin , nitrofurantoin , piperacillin , tetracycline , sulfamethoxazole-trimethoprim and tobramycin .
C0002680
ampicillin
C0031955
piperacillin