title: Purification, structure determination, and antimicrobial activity of neutramycins B-G.
abstract: Neutramycins B-G were purified from a historical sample of neutramycin in our antibiotic collection. The structures of the compounds were solved by 2D NMR spectroscopic analysis. Four of the compounds (2-5) are probable biosynthetic intermediates or shunt metabolites of neutramycin biosynthesis, while two (6, 7) are likely to be degradation products. Only one intermediate (5) showed weak Gram-positive activity.
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006094:Gram-Positive Bacteria / Q000187:drug effects; D018942:Macrolides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D013211:Staphylococcus aureus / Q000187:drug effects; D013302:Streptomyces / Q000737:chemistry* / Q000378:metabolism
chemical_list: D000900:Anti-Bacterial Agents; D018942:Macrolides