Patent ID: 8202866

Claim:
A compound of formula I, wherein R 1 is selected from the group consisting of: hydrogen; halogen; lower alkyl, unsubstituted or once or several times substituted by halogen; cycloalkyl; cyano; and lower alkoxy; R 2 is —(CH 2 ) n —R 3 or —NR 4 R 5 ; R 3 is a 3 to 10-membered heterocyclyl ring, unsubstituted or once or several times substituted by halogen, lower alkyl, hydroxy, —C(O)-lower alkoyl, ═O, or NR 4 R 5 ; R 4 is hydrogen or lower alkyl; R 5 is hydrogen or lower alkyl; n is 0, 1, 2, or 3; and X is C or N; or a pharmaceutically active salt, racemic mixture, enantiomer, optical isomer or tautomeric form thereof.