| abstract |
The compounds are used for diagnosis and therapy. They comprise the following components: a) complexing ligands of the general formula A- {X- [Y- (Z- <W-Kwz) y] x} a, wherein A represents a nitrogen containing baseplate of basic multiplicity? and Y independently of one another are a direct link or a stepped reproduction unit with a reproduction multiplicity x, respectively, y, Z and W are each independently a reproductive unit of reproduction multiplicity z, w, K is a complexing agent residue, and has a value of 2 to 12, x, y, z and w each independently from 1 to 4, provided at least two reproduction units are different, and for the multiplication product the condition 16 is a. x. y. z. w <64 and that at least one stepped reproduction unit X, Y, Z, W is a 1,4,7,10-tetraazacyclododecanoic or 1,4,8,11-tetraazacyclotetradecan reprocessing unit; (b) at least 16 ions of an element of sequence number 20 to 29, 39, 42, 44 or 57-83; c) optionally cations of inorganic and / or organic bases, amino acids or amino acid amides, and d) optionally acylated terminal amino groups. |