title: Synthesis of 6-hydroxypenicillanates and 7-hydroxycephalosporanates.
mesh_terms: D002511:Cephalosporins / Q000138:chemical synthesis*; D006900:Hydroxylation; D008722:Methods; D010406:Penicillins / Q000138:chemical synthesis
chemical_list: D002511:Cephalosporins; D010406:Penicillins