first-generation cephalosporin ceftezole PubChem:65755 ARO:3009114 cephtezole CAS:26973-24-0 ChEMBL:CHEMBL1697829 Ceftezole is a first-generation cephalosporin antibiotic with antibacterial activity. Ceftezole binds to and inactivates penicillin-binding proteins located on the inner membrane of the bacterial cell wall causing cell lysis. It is a cephalosporin and a thiadiazole. ChEBI:135716 antibiotic_resistance