title: The structure of narasin and a related ionophore.
abstract: Using electron impact and field desorption mass spectrometry, structures are proposed for narasin and a related ionophore, A28086B, derived from fermentation. The ionic fragmentation of these compounds and their derivatives is discussed and compared with that of salinomycin, whose structure has been determined by X-ray diffraction.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D007476:Ionophores; D013058:Mass Spectrometry; D008745:Methylation; D011714:Pyrans; D000095662:Polyether Polyketides
chemical_list: D007476:Ionophores; D011714:Pyrans; C013374:A28086B; D000095662:Polyether Polyketides; C010327:salinomycin; C013612:narasin