when administered orally or parenterally , definite synergy was demonstrated between the amidinopenicillins and ampicillin , amoxicillin , benzylpenicillin , cefazolin , or carbenicillin in infections with a number of gram-negative bacteria , including klebsiella , enterobacter , escherichia , proteus , salmonella , and haemophilus species in mice .
C0030827
benzylpenicillin
C0006976
carbenicillin