Patent ID: 7390902

Claim:
A radiolabeled compound or salt thereof of Formula wherein: each of X, Y, and Z is a substituent selected from the group consisting of a hydrogen, a halogen, a C 1 -C 4 alkoxyl, a C 1 -C 4 alkyl, a C 1 -C 4 fluoroalkyl, a C 1 -C 4 fluoroalkoxyl, a CF 3 , and an OCF 3 , wherein at least one of X, Y and Z comprises a radioisotope selected from the group consisting of a bromine, an iodine, a carbon of a 2-methoxyl and a tritium of a 2-methoxyl; n is an integer from 2 to about 10; and each of A and A 1 is independently selected from the group consisting of a C 1 -C 4 alkoxyl, a C 1 -C 4 fluoroalkyl and a C 1 -C 4 fluoroalkoxyl.