Patent ID: 7741354

Claim:
A compound of formula (I) wherein R 1 represents heteroaryl, -carbocyclyl-heteroaryl, -alkenylheteroaryl or -alkylheteroaryl; R 2 represents alkyl, which may optionally be substituted by one or more groups selected from amino, halogen, hydroxyl, -alkoxy, -thioalkyl, —C(O)O-alkyl and —C(O)OH; carbocyclyl, which may optionally be substituted by one or more groups selected from alkyl, haloalkyl, amino, halogen, hydroxyl, alkoxy-, -thioalkyl, —C(O)O-alkyl and —C(O)OH; alkenyl; alkynyl; -alkyl-aryl; -alkyl-heteroaryl; -alkyl-heterocyclyl; -alkyl-carbocyclyl; -aryl-heteroaryl; -heteroaryl-aryl; -heteroaryl-heteroaryl; -aryl-aryl; -aryl; heteroaryl; heterocyclyl; or R 2 together with R 4 may form a carbocyclyl group optionally substituted by one or more alkyl groups; R 3 represents alkyl, which may optionally be substituted by one or more groups selected from amino, halogen, hydroxyl, alkoxy-, -thioalkyl, —C(O)OH and —C(O)O-alkyl; carbocyclyl, which may optionally be substituted by one or more groups selected from alkyl, amino, halogen, haloalkyl, hydroxyl, -alkoxy, -thioalkyl, —C(O)OH and —C(O)O-alkyl; alkenyl; -alkyl-aryl; -alkyl(aryl) 2 , -alkyl(heteroaryl) 2 , -alkyl(aryl)(heteroaryl), -alkyl-heteroaryl; -alkyl-heterocyclyl which heterocyclyl group may optionally be substituted by one or more groups selected from alkyl, hydroxyl and oxo; -alkyl-carbocyclyl; -aryl-heteroaryl; -heteroaryl-aryl; -aryl-aryl; -aryl-O-aryl; -heteroaryl-heteroaryl; -aryl; heteroaryl; heterocyclyl; -aryl-alkyl-aryl; -aryl-O-alkyl-aryl; -alkyl-C(O)—NH-alkyl-aryl; -alkyl-C(O)—NH-alkyl-heteroaryl; -alkyl-C(O)—NH-alkyl-heterocyclyl; -alkyl-C(O)—(N-piperidinyl) or -alkyl-C(O)—(N-pyrrolidinyl) in which piperidinyl or pyrrolidinyl may optionally be fused to optionally substituted phenyl; R 4 represents H or alkyl; or a pharmaceutically acceptable salt thereof, including all tautomers and stereoisomers thereof.