Patent ID: 7425318

Claim:
A pharmaceutical composition, comprising a compound of Formula III and a pharmaceutically acceptable excipient or diluent, wherein a compound of Formula III is selected from: or a pharmaceutically acceptable salt thereof, wherein R 3 is hydrogen or -L-Ch; R 1 and R 2 are independently hydrogen, C 1-4 alkyl, C 2-4 aminoalkyl, C 1-4 haloalkyl, haloarylalkyl, -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 a covalent bond or linking group selected from the group consisting of: —(CH 2 ) n —, or —(CH 2 ) n —C(O)— where n is an integer from 0 to 5; and Ch is a tetradentate ligand capable of complexing with a metal; with the proviso that one and only one of R 1 , R 2 and R 3 is -L-Ch.