Patent ID: 8629166

Claim:
A compound according to formula (I), wherein R 1 is selected from the group consisting of C 1-7 -alkyl, C 3-7 -cycloalkyl, C 3-7 -cycloalkyl-C 1-7 -alkyl, hydroxy-C 1-7 -alkyl, C 1-7 -alkoxy-C 1-7 -alkyl, and halogen-C 1-7 -alkyl; R 2 is selected from the group consisting of C 3-7 -cycloalkyl, C 4-7 -cycloalkenyl, and heterocyclyl, said heterocyclyl having 3 to 7 ring atoms, comprising one, two or three heteroatoms selected from N, O and S and being saturated or partly unsaturated; R 3 is selected from the group consisting of C 1-7 -alkyl, C 3-7 -cycloalkyl, said cycloalkyl being unsubstituted or substituted by hydroxy, lower heterocyclyl, said heterocyclyl having 3 to 7 ring atoms, comprising one, two or three heteroatoms selected from N, O and S and being unsubstituted or substituted by hydroxy or oxo, —(CH 2 ) m -phenyl, wherein phenyl is unsubstituted or substituted by one or two groups selected from the group consisting of C 1-7 -alkyl, hydroxy, C 1-7 -alkoxy, cyano, C 3-7 -cycloalkyl, C 3-7 -cycloalkyl-C 1-7 -alkyl, halogen and halogen-C 1-7 -alkyl and m is selected from 0 or 1, and —(CH 2 ) n -heteroaryl, wherein heteroaryl is unsubstituted or substituted by one or two groups selected from the group consisting of C 1-7 -alkyl, hydroxy, C 1-7 -alkoxy, cyano, C 3-7 -cycloalkyl, C 3-7 -cycloalkyl-C 1-7 -alkyl, halogen and halogen-C 1-7 -alkyl and n is selected from 0 or 1; and R 4 is hydrogen or C 1-7 -alkyl; or a pharmaceutically acceptable salt thereof.