Patent ID: 7759502

Claim:
A compound of general Formula II: or a pharmaceutically acceptable salt thereof, wherein: Z is O; R 9 , R 10 and R 11 , in each instance, is independently selected from the group consisting of hydrogen, halogen, C 1-4 alkyl, cyano, carboxy(C 1-5 )alkyl, trifluoromethyl, nitro, methylamino, dimethylamino, halo(C 1-4 )alkyl, and formyl; R 12 is selected from the group consisting of: a. C 1-4 alkylthio, b. C 1-4 alkylsulfonyl, c. hydroxy, d. C 1-4 alkoxy, e. NR 13 R 14 , wherein R 13 and R 14 are hydrogen or C 1-4 alkyl, f. phenyl(C 1-4 )alkyl, g. C 6-10 aryl, h. heteroaryl, i. heterocycle, j. heterocycle(C 1-4 )alkyl, and k. C 3-6 cycloalkyl, wherein said phenyl(C 1-4 )alkyl, C 6-10 aryl, heteroaryl, heterocycle, heterocycle(C 1-4 )alkyl or C 3-6 cycloalkyl are substituted with one of the following: C 1-4 alkylthio, C 1-4 alkyl sulfonyl, methoxy, hydroxy, dimethylamino or methylamino; and X′ is 125 I, 123 I, 131 I, 18 F, 76 Br, 77 Br or Sn(alkyl) 3 .