Preparation and characterization of technetium and rhenium tricarbonyl complexes bearing the 4-nitrobenzyl moiety as potential bioreductive diagnostic radiopharmaceuticals. In vitro and in vivo studies
pharmacophore and the preparation of the corresponding technetium and rheniumcomplexes are presented. (99m)Tc labelling was performed in high yield (>90%) by ligand substitution using fac-[(99m)Tc(CO)(3)(H(2)O)(3)](+) as precursor. The structure of the technetiumcomplex was established by chromatographic comparison with the analogous rhenium compound which was fully characterized by elemental analysis