| abstract |
Porphyrin complex compounds contain a meso-tetraphenyl porphyrin ligand having general formula (I), in which R?1, R2 and R3¿ have different meanings, an ion of an element having an atomic number from 21 to 32, equal to 38 or 39, from 42 to 51 or from 58 to 83, and if required one or several physiologically neutral cations of inorganic and/or organic bases, aminoacids or aminoacid amides. These compounds are valuable diagnostic agents. |