title: Fast atom bombardment and collisional activation mass spectrometry as probes for the identification of positional isomers in a series of benzylated guanosines.
mesh_terms: D001593:Benzyl Compounds / Q000032:analysis; D006151:Guanosine / Q000031:analogs & derivatives* / Q000032:analysis; D013058:Mass Spectrometry; D013237:Stereoisomerism
chemical_list: D001593:Benzyl Compounds; D006151:Guanosine