US5630997A
University of Texas System
The present invention relates to a new polyazamacrocyclic compound or a salt thereof and its uses as a tissue specific chelator. The compound has the formula where x is 2, 3 or a combination of p 2(s) and q 3(s) where p +q=y; y is 3 or 4; R is (CH2)zP(=O)OR1OR2; R1 is H or CH3; R2 is CnH1+ …