Patent ID: 7999000

Claim:
A compound according to formula (I), wherein: R 1 is selected from the group consisting of: hydrogen; lower alkyl; cycloalkyl; heterocyclyl; aryl and heteroaryl; wherein said lower alkyl; cycloalkyl; heterocyclyl; aryl or heteroaryl may be unsubstituted or once or several times substituted by: halogen; lower alkyl, which is unsubstituted or once or several times substituted by halogen; lower alkoxy; cycloalkyl; cyano; —NR a R b ; —OCF 3 ; or —S(O) 2 -lower alkyl; R a and R b are: each independently lower alkyl or cycloalkyl, or together with the nitrogen atom to which they are attached, form a 4 to 6 membered heterocyclyl; R 2 and R 3 : are each independently selected from the group consisting of: hydrogen; halogen; lower alkyl, which is unsubstituted or once substituted by hydroxy; lower alkoxy; hydroxy; heterocyclyl; —NRR′; or together with the carbon atoms to which they are attached, form a 4 to 6 membered cycloalkyl or a 4 to 6 membered heterocyclyl wherein one ring atom is a heteroatom; R 4 is selected from the group consisting of: hydrogen; halogen; lower alkyl, which is unsubstituted or once substituted by hydroxy; lower alkoxy; hydroxy; heterocyclyl; —NRR′; or R and R′ are each independently selected from the group consisting of: hydrogen; lower alkyl substituted by hydroxy; —C(O)-lower alkyl; and lower alkyl; and n is 0, 1 or 2; or a pharmaceutically-active salt, racemic mixture, enantiomer, optical isomer, or tautomeric form thereof.