Patent ID: 6995247

Claim:
A bifunctional compound of one of the following formulae: wherein for compound (I), R is selected from the group consisting of P(O)R′OH and P(O)(OR′)OH, wherein for compound (II), R is selected from the group consisting of CO 2 H, CONHR′, P(O)R′OH and P(O)(OR′)OH, R′ is selected from the group consisting of H, a C 1 –C 3 alkyl, phenyl and benzyl, wherein said phenyl or benzyl is substituted or unsubstituted, n is 1–6, and X is selected from the group consisting of NO 2 , NH 2 , NCS, NHC(O)CH 2 Z, in which Z is selected from the group consisting of Cl, Br and I, and wherein said compound is chelated to 225 Ac.