shv-5 beta-lactamase caused decreased susceptibility to most penicillins , cephalosporins , and monobactams , except imipenem and compounds which have a c6 or c7 alpha-methoxy substituent . beta-lactamase inhibitors ( clavulanic acid , sulbactam , and tazobactam ) inhibited its activity and showed a synergistic effect when associated with different hydrolyzable beta-lactam compounds .
C0030842
penicillins
C0282215
beta-lactam