Patent ID: 7399778

Claim:
A compound having the structure of formula (Ia), or a pharmaceutically acceptable salt thereof: wherein, R 1 is selected from the group consisting of lower alkyl, substituted lower alkyl, phenyl, substituted phenyl, benzyl, substituted benzyl, benzyloxy, substituted benzyloxy, and SO 2 R 5 ; R 5 is selected from the group consisting of phenyl, substituted phenyl, heterocycle, substituted heterocycle, alkyl, and substituted alkyl; R 2 is selected from the group consisting of lower alkyl, CF 3 , alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, phenyl, substituted phenyl, cycloalkyl, and substituted cycloalkyl; R 3 is selected from the group consisting of hydrogen, lower alkyl, and substituted lower alkyl; R 4 is selected from the group consisting of heterocycle and substituted heterocycle; R 6 is selected from the group consisting of hydrogen, lower alkyl, substituted lower alkyl, CF 3 , alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, phenyl, substituted phenyl, cycloalkyl, and substituted cycloalkyl; W is N; X and Y are CR 7 ; and R 7 is selected from the group consisting of hydrogen, halogen, lower alkyl, and substituted lower alkyl.