title: Beta-lactam antibiotics from Streptomyces.
mesh_terms: D000900:Anti-Bacterial Agents / Q000302:isolation & purification*; D002511:Cephalosporins / Q000302:isolation & purification; D013058:Mass Spectrometry; D010406:Penicillins / Q000302:isolation & purification; D013302:Streptomyces / Q000378:metabolism*
chemical_list: D000900:Anti-Bacterial Agents; D002511:Cephalosporins; D010406:Penicillins