ytr 830 , a new beta-lactamase inhibitor , combined with amoxicillin or carbenicillin , showed a synergistic effect similar to that observed with clavulanic acid , and generally better than that with sulbactam , against strains harboring chromosome-encoded penicillinases and broad-spectrum beta-lactamases or plasmid-determined beta-lactamases .
C0030841
penicillinases
C0597979
beta-lactamases