Patent ID: RE44354

Claim:
A pharmaceutical composition , comprising a compound of Formula III′ and a pharmaceutically acceptable excipient or diluent, wherein a the compound of Formula III′ is selected from : or a pharmaceutically acceptable salt thereof, wherein A, B , and D are CH or N, provided that at least no more than two of A, B , and D is N; R 3 is Br, I, F, 125 I, 131 I, 123 I, 18 F, 76 Br, 77 Br, haloalkyl, Sn(alkyl) 3 or -L-Ch; R 1 and R 2 are independently selected from the group consiting of hydrogen, C 1-4 alkyl, C 2-4 aminoalkyl, C 1-4 haloalkyl, haloarylalkyl, and -L-Ch, or R 1 and R 2 are taken together with the nitrogen to which they are attached to form a 5- to 7-member heterocyclic ring optionally having O, S , or NR 5 in said ring, where R 5 is hydrogen or C 1-4 alkyl; L is —(CH 2 ) n — , or —(CH 2 ) n —C(O)— where n is 0-5; and Ch is a tetradentate ligand capable of complexing with a metal; with the proviso that only one of R 1 , R 2 , and R 3 can be is -L-Ch.