Patent ID: 8604245

Claim:
A compound represented by the structure of formula I, or its salt: wherein Z is carbon; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently selected from the group consisting of —(CH 2 ) n -haloalkyl; alkylhaloalkyl; CH 2 ) n -aryl; haloaryl; —CH 2 ) n -cycloalkyl; —(CH 2 ) n -heterocycloalkyl; —(CH 2 ) n -heteroaryl; alkylheteroaryl; —(CH 2 ) n -aminoalky; and —(CH 2 ) n -dialkylamino, wherein n is between 1-6; and R 7 is methyl.