Patent ID: 8901134

Claim:
A compound of formula (I) or a pharmaceutically acceptable salt thereof, wherein: R 1 is unsubstituted C 1 -C 3 -alkyl; R 2 is phenyl having the substitution pattern, where the R 2 phenyl is fused at R 4 -R 5 , R 5 -R 6 , R 6 -R 7 or R 7 -R 8 by a heteroaryl group selected from thienyl, furanyl, pyrrolyl, pyrazolyl, imidazolyl, oxazolyl, isoxazolyl, thiazolyl, and isothiazolyl, a C 4 -C 6 carbocyclic group or a 6 membered heterocyclyl group, where the fused heteroaryl group is independently optionally substituted by one or more groups selected from List X; List X represents hydroxyl, cyano, nitro, C 1 -C 8 -alkyl, C 1 -C 8 -alkoxy, halogen, formyl, amino, C 1 -C 8 -alkylamino, di-C 1 -C 8 -alkylamino, C 1 -C 8 -alkylamidino, —N(H)C(═NH)C 1 -C 8 -alkyl, —N(C 1 -C 8 -alkyl)C(═NH)C 1 -C 8 -alkyl, C 1 -C 8 -alkylaminocarbonyl, di-C 1 -C 8 -alkylaminocarbonyl, aminocarbonylamino, aminocarbonyl(C 1 -C 8 -alkyl)amino, C 1 -C 8 -alkylaminocarbonylamino, di-C 1 -C 8 -alkylaminocarbonylamino, C 1 -C 8 -alkylaminocarbonyl(C 1 -C 8 -alkyl)amino, di-C 1 -C 8 -alkylaminocarbonyl(C 1 -C 8 -alkyl)amino, C 1 -C 8 -alkylcarbonylamino, C 1 -C 8 -alkylcarbonyl(C 1 -C 8 -alkyl)amino, C 1 -C 8 -alkylthiocarbonylamino, C 1 -C 8 -alkylthiocarbonyl(C 1 -C 8 -alkyl)amino, hydroxysulfonyl, C 1 -C 8 -alkylsulfonylamino, C 1 -C 8 -thioalkyl, C 1 -C 8 -alkylsulfinyl, C 1 -C 8 -alkylsulfonyl, aminosulfonyl, C 1 -C 8 -alkylaminosulfonyl or di-C 1 -C 8 -alkylaminosulfonyl; R 3 is hydrogen, amino or C 1 -C 3 -alkylamino; Y represents hydrogen, C 1 -C 8 -alkyl, C 1 -C 8 -alkoxy where each of the afore-mentioned hydrocarbon groups may be optionally substituted, where chemically feasible, by one or more halogen, hydroxyl, amino, C 1 -C 8 -alkylamino, di-C 1 -C 8 -alkylamino or C 1 -C 8 -alkoxy groups, or Y represents the group —(C 0 -C 4 -alkylene)-N(R 15 )R 16 ; and R 15 and R 16 independently represent hydrogen or C 1 -C 4 -alkyl, or R 15 is hydrogen and R 16 is C 1 -C 4 -alkyl substituted by phenyl, a 5-6 membered heteroaryl group, a C 4 -C 6 carbocyclic group or a 5-6 membered heterocyclyl group, where said rings are optionally substituted by one or more hydroxyl, nitro, C 1 -C 8 -alkyl, C 1 -C 8 -alkoxy, halogen, amino, C 1 -C 8 -alkylamino, di-C 1 -C 8 -alkylamino, C 1 -C 8 -alkylsulfonyl, aminosulfonyl, C 1 -C 8 -alkylaminosulfonyl or di-C 1 -C 8 -alkylaminosulfonyl groups, where each of the afore-mentioned hydrocarbon groups may be optionally substituted, where chemically feasible by one or more halogen, hydroxyl, amino, C 1 -C 4 -alkylamino, di-C 1 -C 4 -alkylamino or C 1 -C 4 -alkoxy groups, or R 15 and R 16 together with the N to which they are attached form a 5-6-membered heterocyclic ring.