Patent ID: 8791144

Claim:
A compound according to formula (I) or a stereochemically isomeric form thereof, wherein R 1 and R 2 each independently represent hydrogen or C 1-4 alkyl; R 3 is C 1-6 alkyl optionally substituted with one or more substituents independently selected from the group consisting of hydroxyl, cyano, C 1-6 alkyloxy, benzyloxy, R x R y N—C(═O)—, and R z O—C(═O)—; R x and R y each independently represent hydrogen, C 1-4 alkyl, cycloC 3-6 alkyl or (cycloC 3-6 alkyl)C 1-4 alkyl; R z represents hydrogen or C 1-3 alkyl; R 4 , R 5 and R 6 each independently represent hydrogen, halo, C 1-6 alkyl, cyano, trifluoromethyl, trifluoromethoxy, or methoxy; or R 4 and R 5 when attached to 2 vicinal carbon atoms together form a bivalent radical of formula —O—CF 2 —O—; or a pharmaceutically acceptable addition salt thereof.