the enzymes conferred to derivatives a high level of resistance to amoxicillin , ticarcillin , piperacillin , and cephalothin and a decreased degree of susceptibility ( i.e. , mics increased by 10- to 800-fold ) to cefotaxime , ceftriaxone , ceftazidime , and aztreonam .
C0007554
cefotaxime
C0007561
ceftriaxone