title: Characterisation of guanidino-containing antibiotics: field desorption mass spectrometry of bleomycin B2 and phleomycins D1 and E.
mesh_terms: D001761:Bleomycin; D013058:Mass Spectrometry / Q000379:methods; D008968:Molecular Conformation; D010692:Phleomycins
chemical_list: D010692:Phleomycins; D001761:Bleomycin