cefalotin CHEBI:41547 A semisynthetic, first-generation cephalosporin antibiotic with acetoxymethyl and (2-thienylacetyl)nitrilo moieties at positions 3 and 7, respectively, of the core structure. Administered parenterally during surgery and to treat a wide spectrum of blood infections. CHEBI:50895 cephalosporin thiophenes carboxylic acid azabicycloalkene semisynthetic derivative beta-lactam antibiotic allergen