cephalosporin 182.999 183.18500 A class of beta-lactam antibiotics differing from the penicillins in having a 6-membered, rather than a 5-membered, side ring. Although cephalosporins are among the most commonly used antibiotics in the treatment of routine infections, and their use is increasing over time, they can cause a range of hypersensitivity reactions, from mild, delayed-onset cutaneous reactions to life-threatening anaphylaxis in patients with immunoglobulin E (IgE)-mediated allergy. C7H5NO3SR2 CHEBI:23066 CHEBI:3538 Cephalosporin KEGG:C00875 PMID:10069359 PMID:11936371 PMID:12833570 PMID:24269048 PMID:3320614 PMID:6762896 PMID:8426246 Wikipedia:Cephalosporin [H][C@]12SCC([*])=C(N1C(=O)[C@H]2[*])C(O)=O cephalosphorin cephalosphorins cephalosporins chebi_ontology cephem