title: Antibiotics of the penicillin and cephalosporin family.
mesh_terms: D002511:Cephalosporins / Q000138:chemical synthesis / Q000266:history; D049673:History, 20th Century; D010406:Penicillins / Q000138:chemical synthesis / Q000266:history
chemical_list: D002511:Cephalosporins; D010406:Penicillins