Letter: Beta-thionolactam analogs of cephalosporins and penicillins.
D002511:Cephalosporins / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D010406:Penicillins / Q000138:chemical synthesis*; D013871:Thiones / Q000138:chemical synthesis; D047090:beta-Lactams / Q000138:chemical synthesis
D002511:Cephalosporins; D010406:Penicillins; D013871:Thiones; D047090:beta-Lactams