Patent ID: 7291612

Claim:
A compound of formula (I) or a pharmaceutically or veterinarily acceptable salt thereof: wherein R 1 and R 3 independently represent H; F; Cl; Br; —NO 2 ; —CN; C 1 -C 6 alkyl optionally substituted by F or Cl; or C 1 -C 6 alkoxy optionally substituted by F; R 2 represents H, or optionally substituted C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl or optionally substituted phenyl; Y represents —O—, —S—, N-oxide, or —N(R 5 )— wherein R 5 represents H or C 1 -C 6 alkyl; X represents a bond or a divalent C 1 -C 6 alkylene radical; R 4 represents —NR 7 C(═O)R 6 , —NR 7 C(═O)OR 6 , —NHC(═O)NHR 6 or —NHC(═S)NHR 6 wherein: when R 4 represents —NR 7 C(═O)R 6 or —NR 7 C(═O)OR 6 , R 6 represents H, or a radical of formula —(Alk) b -Q wherein b is 0 or 1 and Q represents H; —CF 3 ; —OH; —SH; —NR 8 R 8 wherein each R 8 may be the same or different; an ester group; or an optionally substituted phenyl, C 3 -C 7 cycloalkyl, C 5 -C 7 cycloalkenyl or heterocyclic ring having from 5 to 8 ring atoms; when R 4 represents —NHC(═O)NHR 6 or —NHC(═S)NHR 6 , R 6 represents a radical of formula —(Alk) b -Q wherein b is 1 and Q represents —CF 3 ; —OH; —SH; —NR 8 R 8 wherein each R 8 may be the same or different; an ester group; or an optionally substituted phenyl, C 3 -C 7 cycloalkyl, C 5 -C 7 cycloalkenyl or heterocyclic ring having from 5 to 8 ring atoms; where Alk is a divalent straight chain or branched C 1 -C 12 alkylene, C 2 -C 12 alkenylene or C 2 -C 12 alkynylene radical which may be interrupted by one or more non-adjacent —O—, —S— or —N(R 8 )— radicals wherein R 8 represents H or C 1 -C 4 alkyl, C 3 -C 4 alkenyl, C 3 -C 4 alkynyl, or C 3 -C 6 cycloalkyl, and R 7 represents H or C 1 -C 6 alkyl; or when taken together with the atom or atoms to which they are attached R 6 and R 7 form an optionally substituted heterocyclic ring having from 5 to 8 ring atoms.