Patent ID: 8093249

Claim:
A compound of formula (I), or a salt thereof, R 1 is C 1-4 alkyl, halogen or cyano; m and n are selected from 0, 1 and 2; R 2 is C 1-4 alkyl; R 3 is hydrogen, cyano, C 1-4 haloalkyl, C 1-4 haloalkoxy or halogen; R 4 is hydrogen or C 1-4 alkyl; R 5 is hydrogen, cyano, C 1-4 haloalkyl, C 1-4 haloalkoxy or halogen; R 6 is hydrogen, cyano, C 1-4 haloalkyl, C 1-4 haloalkoxy or halogen; such that at least 1 of R 3 , R 4 , R 5 and R 6 is a group other than hydrogen; R 7 is hydrogen or C 1-4 alkyl; such that when R 7 is C 1-4 alkyl, n is 0.