Patent ID: 8003654

Claim:
A compound of formula (I) wherein A represents B represents O or S; R 1 represents halogen or cyano; R 3 represents (C 1-4 )alkyl, (C 3-6 )cycloalkyl or hydroxy(C 1-4 )alkyl; R 4 represents (C 1-4 )alkyl or an unsubstituted, monosubstituted or di-substituted five- or six-membered heteroaryl wherein the substituents are independently selected from the group consisting of halogen, (C 1-4 )alkyl, (C 1-4 )alkoxy, trifluoromethyl, difluoromethoxy and trifluoromethoxy; R 5 represents N(CH 3 ) 2 , or isopropenyl; or a pharmaceutically acceptable salt thereof.