title: CNDO-2 study of the antibacterial activity of penicillins and cephalosporins.
mesh_terms: D002511:Cephalosporins; D055598:Chemical Phenomena; D002621:Chemistry; D004735:Energy Transfer; D007700:Kinetics; D008968:Molecular Conformation; D010406:Penicillins; D011485:Protein Binding; D011789:Quantum Theory; D013329:Structure-Activity Relationship
chemical_list: D002511:Cephalosporins; D010406:Penicillins