Patent ID: 7122683

Claim:
A compound of Formula (I) and pharmaceutically and/or veterinarily acceptable salts thereof, wherein: R 1 , R 2 , R 3 and R 20 are each independently H, Cl, Br, F, I, CF 3 , Me or Et; R 4 is het or C 3-7 cycloalkyl optionally substituted by C 1-4 alkyl; a is 0 or 1; and het is a non-aromatic 5-membered heterocycle which contains at least one N, O or S heteroatom, optionally fused to a 5- or 6-membered carbocyclic group or a second 4-, 5- or 6-membered heterocycle which contains at least one N, O or S heteroatom, wherein the het group is optionally substituted by at least one substituent independently selected from C 1-8 alkyl, C 1-8 alkoxy, OH, halo, CF 3 , OCF 3 , SCF 3 , hydroxy-C 1-6 alkyl, C 1-4 alkoxy-C 1-6 alkyl and C 1-4 alkyl-S—C 1-4 alkyl; provided that at least one of R 1 , R 2 and R 3 is other than H.