Building better beta-lactams.
D000818:Animals; D002417:Cattle; D006666:History of Medicine; D010406:Penicillins / Q000266:history / Q000494:pharmacology; D011955:Receptors, Drug; D047090:beta-Lactams / Q000138:chemical synthesis*
D010406:Penicillins; D011955:Receptors, Drug; D047090:beta-Lactams