Patent ID: 8138336

Claim:
A compound having the formula (I): or a physiologically acceptable salt or stereoisomer thereof, wherein: R 1 is -(C 1 -C 4 )alkyl, -(C 1 -C 4 )alkyl-CF 3 , -(C 3 -C 6 )cycloalkyl, or -(C 2 -C 4 )alkyl-NR 5 R 6 ; R 2 is hydrogen or -(C 1 -C 4 )alkyl; R 3 is halogen; R 4 is methyl or ethyl; and R 5 and R 6 , may be the same or different, and are independently hydrogen, methyl, ethyl, or R 5 and R 6 may be taken together with the nitrogen to which they are bound to form a pyrrolidine ring.