Patent ID: 7837982

Claim:
An amino acid analog having Formula I: wherein Y is (CR 5 ,R 6 )n, n=1 or 2; X is selected from the group consisting of halogen, C1-C6 haloalkyl and C1-C6 haloalkenyl, where halo or halogen in X is selected from the group consisting of F, Cl, Br, I, At, F-18, Br-76, I-123, I-124, I-125, and I-131; R 4 is H; R 5 and R 6 are independently selected from the group consisting of H, and C1-C6 alkyl; R 1 and R 2 are independently selected from the group consisting of H, and C1-C6 alkyl; R 3 is selected from the group consisting of H, and C1-C6 alkyl; or a pharmaceutically acceptable salt thereof.