L-640876 is a broad-spectrum and orally active lactam antimicrobial agent. L-640876 showa MIC90 of 0.125 pg/mL for the E. coli strains, 2 /mg/mL for the S.choleraerai strains and 4 pg/mL for the S. typhinwrium strains[1].
References
[1] T M Jacks, et al. Quaternary heterocyclylamino beta-lactams. V. L-640,876 treatment of induced enterotoxigenic colibacillosis (scours) in calves and piglets. J Antibiot (Tokyo). 1983 Jan;36(1):70-5. DOI:10.7164/antibiotics.36.70
