Patent ID: 7553833

Claim:
A compound of the formula wherein X is selected from the group consisting of hydrogen, halogen, cyano, nitro, ethynyl and cyclopropyl, Y is hydrogen or fluoro, R 1 , R 2 , R 3 and R 4 are selected from the group consisting of hydrogen, lower alkyl, lower alkoxyl, substituted lower alkyl, lower alkenyl, lower alkynyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocycle, substituted heterocycle, cycloalkyl, substituted cycloalkyl, cycloalkenyl, and substituted cycloalkenyl, with the proviso that one of R 1 /R 2 or R 3 /R 4 is hydrogen and the other not hydrogen, R 5 is selected from the group consisting of hydrogen, lower alkyl or substituted lower alkyl or a pharmaceutically acceptable salt thereof.