| abstract |
The invention relates to ligands having the formula (I), in which X represents a heterocyclic group, together with the process for their preparation. The invention also concerns mono- or polymetallic complexes formed by said ligands with metallic ions selected from lanthanide ions, transition metal ions, barium ion, bismuth ion, lead ion and the radioisotopes 99mTc?, 111In?, 90Y?, 64Cu? and 169Yb?, as well as salts physiologically acceptable to these complexes. The salts of said complexes can be used as diagnostic and therapeutic agents in magnetic resonance imaging, radiology, in vivo chemical displacement agents and in nuclear medicine. |