title: Structure of cervinomycin, a novel xantone antibiotic active against anaerobe and mycoplasma.
abstract: The structures of cervinomycins A1 (1) and A2 (2), a potent anti-anaerobic and anti-mycoplasmal antibiotic were investigated by means of recent NMR techniques of O-methyl ether (3) and C,O-dimethyl ether (4) obtained by methylation of 2 with CH3I in the presence of Ag2O. The antibiotic 2 posesses a polycyclic structure involving a xanthone skeleton. The structure of 1 was confirmed to be a hydroquinone of 2 from the evidences that oxidation of 1 with Ag2O and acetylation of 1 with (CH3CO)2O in pyridine afforded quantitatively 2 and triacetylcervinomycin A1 (7), respectively.
mesh_terms: D018943:Anthracyclines; D000900:Anti-Bacterial Agents / Q000302:isolation & purification* / Q000494:pharmacology; D000903:Antibiotics, Antineoplastic; D001421:Bacteria, Anaerobic / Q000187:drug effects; D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D009174:Mycoplasma / Q000187:drug effects; D009279:Naphthacenes / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D018943:Anthracyclines; D000900:Anti-Bacterial Agents; D000903:Antibiotics, Antineoplastic; D009279:Naphthacenes; C035628:cervinomycin A2; C035636:cervinomycin A1