Patent ID: 7030242

Claim:
A compound represented by formula I: or a pharmaceutically acceptable salt thereof, wherein X is nitrogen; R 1 and R 2 are independently selected from the group consisting of hydrogen, hydroxy, and methyl, wherein at least one of R 1 and R 2 is methyl; R 3 and R 4 are independently selected from the group consisting of hydrogen, hydroxy, and methyl, or R 3 and R 4 may be taken together to form a carbonyl group; and R 5 and R 6 are independent substituents in the ortho, meta, or para positions and are independently selected from the group consisting of hydrogen, halogen, cyano, methyl, and ethyl; R 8 is not present; R 7 is hydrogen or a group of the formula: wherein, Y is —CH 2 —NH 2 or —NH—CH 3 ; and when R 7 is H, then R 3 and R 4 are taken together to form a carbonyl group.