Patent ID: 7589125

Claim:
A compound of general formula I: wherein: R 1 represents hydrogen or C 1-4 alkyl; R 2 represents hydrogen or —C(═O)R 7 ; R 3 represents C 1-5 fluoroalkyl, C 2-5 fluoroalkenyl or C 2-5 fluoroalkynyl; R 4 , R 5 and R 6 independently represent hydrogen, C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 alkoxy, C 1-4 haloalkoxy, halogen, cyano, hydroxy, nitro, —NR 8 R 9 , —S(O) x R 10 or —C(═O)R 11 ; R 7 and R 10 independently represent C 1-4 alkyl; R 8 , R 9 and R 11 independently represent hydrogen or C 1-4 alkyl; and x represents 0, 1 or 2; with the proviso that when R 1 represents methyl, R 2 represents hydrogen, R 3 represents 1,1,2,2-tetrafluoroethyl and R 4 and R 5 represent hydrogen then R 6 cannot be hydroxy, and with the further proviso that when R 1 represents hydrogen, R 2 represents hydrogen and R 3 represents 3-fluoropropyl then R 4 , R 5 and R 6 cannot represent simultaneously fluoro; or a salt thereof.