Patent ID: 6869966

Claim:
A compound of the formula (I): (wherein Ar 1 and Ar 2 are independently aryl or heteroaryl, any of which is optionally substituted by a substituent selected from the group consisting of cyano, halogen, nitro, lower alkyl, halo-lower alkyl, hydroxy-lower alkyl, cyclo-lower alkyl, cyclo(lower alkyl)-lower alkyl, lower alkenyl, lower alkylamino, di-lower alkylamino, lower alkanoylamino, lower alkylsulfonylamino, arylsulfonylamino, hydroxy, lower alkoxy, halo-lower alkoxy, aryloxy, heteroaryloxy, lower alkylthio, carboxyl, formyl, lower alkanoyl, lower alkoxycarbonyl, carbamoyl, lower alkylcarbamoyl, di-lower alkylcarbamoyl, lower alkylsulfonyl, arylsulfonyl, aryl and heteroaryl; R 1 and R 2 are independently lower alkyl, cyclo-lower alkyl, cyclo(lower alkyl)-lower alkyl or lower alkoxy, any of which is optionally substituted by a substituent selected from the group consisting of halogen, lower alkylamino, di-lower alkylamino, lower alkanoylamino, hydroxy, lower alkoxy, formyl, lower alkoxycarbonyl, lower alkylcarbamoyl and di-lower alkylcarbamoyl; R 3 , R 4 and R 5 are independently hydrogen, cyano, halogen or hydroxy, or lower alkyl, lower alkoxy or lower alkylthio, the last three groups being optionally substituted by a substituent selected from the group consisting of halogen, lower alkylamino, di-lower alkylamino, lower alkanoylamino, hydroxy, lower alkoxy, formyl, lower alkoxycarbonyl, lower alkylcarbamoyl and di-lower alkylcarbamoyl), or a salt or ester thereof.