title: Electron impact mass spectrometry of maleimycin.
abstract: The mass spectrometric behaviour of maleimycin, a bicyclic maleimide antibiotic, is discussed in detail with the aid of exact mass measurements, metastables (linked scans B/E and B2/E), ionization and appearance energy measurements and deuterium labelling experiments. The unusual loss of NH3 from the molecular ion is highlighted and a possible mechanism is proposed.
mesh_terms: D000900:Anti-Bacterial Agents / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D004583:Electrons; D008301:Maleimides / Q000032:analysis; D013058:Mass Spectrometry / Q000379:methods
chemical_list: D000900:Anti-Bacterial Agents; D008301:Maleimides; C030811:maleimycin