Patent ID: 8163744

Claim:
A compound of formula I and a pharmaceutically acceptable salt or ester thereof, wherein R1 is selected from substituted or unsubstituted morpholinyl, substituted or unsubstituted pyrrolidinyl and substituted or unsubstituted piperazinyl or —NX1(X2), with X1 and X2 independently selected from H, alkyl, cycloalkyl, heteroalkyl, aryl, heteroaryl, arylalkyl or heteroarylalkyl, wherein R2 and R3 are each independently selected from 3- or 4-halogen substituted phenyl or benzyl, wherein R4 is selected from —H, —F, —Cl, —Br, —I, —NO2, hydroxy, lower alkyl, lower alkenyl or lower alkynyl, lower alkoxy, lower alkoxy alkyl —NY1(Y2), with Y1 and Y2 independently selected from H, lower alkyl, lower alkoxy alkyl, heteroalkyl, aryl or heteroaryl.