Patent ID: 7723372

Claim:
A compound of the formula wherein X is oxygen or hydrogen/hydroxy, W is selected from the group consisting of hydrogen, halogen, cyano, nitro, ethynyl and cyclopropyl, Y is hydrogen or fluorine, R 1 is hydrogen, R 2 is selected from the group consisting of lower alkoxyl, lower alkenyl, lower alkynyl, aryl, substituted arly, heteroaryl, substituted heteroaryl, heterocycle, substituted heterocycle, cycloalkyl, substituted cycloalkyl, cycloalkenyl, and substituted cycloalkenyl, 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 3 /R 4 is hydrogen and the other is not hydrogen, or a pharmaceutically acceptable salt or ester thereof.