Patent ID: 7153977

Claim:
A modified ligand having a structure selected from the group consisting of the structures shown below: LBT3001 (1-[2-(5-hydroxy-1H-indol-3-yl)-ethyl]-pyrrole-2,5-dione) LBT3002 (4-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-N-[2-(5-hydroxy-1H-indol-3-yl) -ethyl]-butyramide) LBT3004 (3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-N-[2-(5-hydroxy-1H-indol-3-yl) -ethyl]-propionamide); and LBT3005 (4-(2,5-dioxo-2,5-dihydro-pyrrol-1-ylmethyl)-cyclohexane carboxylic acid [2-(5-hydroxy-1H-indol-3-yl)-ethyl]-amide).