2508-89-6 A 10270A Acetyl-DON Antibiotic from Streptomyces ambofaciens Diazomycin A Duazomycin Duazomycin A L-Norleucine, N-acetyl-6-diazo-5-oxo NSC51097 Norleucine, N-acetyl-6-diazo-5-oxo-, L-