Patent ID: 8703811

Claim:
A compound of Formula V: or a pharmaceutically acceptable salt thereof, wherein: R 1 is ethyl, propyl or cyclopropyl; R 2 is hydrogen; R 3 and R 4 , along with the nitrogen to which they are attached, form a benzoimidazolyl optionally substituted by one or more groups represented by R 5 ; each R 5 is independently halogen, nitro, cyano, (C 1 -C 3 )alkyl, halo(C 1 -C 3 )alkyl, hydroxy(C 1 -C 3 )alkyl, (C 1 -C 3 )alkoxy, halo(C 1 -C 3 )alkoxy, N(R 6 ) 2 , C(═NOH)NH 2 , NR 6 CON(R 6 ) 2 , CON(R 6 ) 2 , CO 2 R 6 , COR 7 , OC(O)R 6 , SO 2 N(R 6 ) 2 , SO 2 R 7 , NR 6 COR 7 , NR 6 CO 2 R 6 , NR 6 SO 2 R 7 or OC(═O)N(R 6 ) 2 ; each R 6 is independently (a) hydrogen; or (b) (C 1 -C 10 )alkyl or aryl(C 0 -C 3 )alkyl, each optionally substituted with halogen, (C 1 -C 3 )alkoxy, (C 1 -C 3 )alkyl, halo(C 1 -C 3 )alkyl, halo(C 1 -C 3 )alkoxy, cyano or nitro; and each R 7 is independently (a) hydrogen or halogen; or (b) (C 1 -C 10 )alkyl, (C 1 -C 10 )alkoxy, aryl(C 0 -C 3 )alkyl or aryl(C 0 -C 3 )alkoxy, each optionally substituted with halogen, (C 1 -C 3 )alkoxy, (C 1 -C 3 )alkyl, halo(C 1 -C 3 )alkyl, halo(C 1 -C 3 )alkoxy, cyano or nitro.