Patent ID: 7560552

Claim:
A compound of formula (I) or a therapeutically acceptable salt thereof, wherein X is N; Z 1 is CR 4 ; Z 2 is CR 5 ; Z 3 is CR 6 ; Z 4 is CR 7 ; R 1 is hydrogen; m is 0; R 2 is nitro, —NR a R b or —LR 8 ; R 4 , R 5 , R 6 , and R 7 are independently selected from the group consisting of hydrogen, alkoxy, alkyl, NR a R b , halo, and hydroxy; R a and R b are hydrogen; R 8 is phenyl, which is unsubstituted or substituted with one or two of independently selected alkyl, halo or haloalkyl; L is —O— or —(CH 2 ) n NR 9 C(O)NR 10 (CH 2 ) p — wherein each group is drawn with its right side attached to R 8 , and wherein R 9 and R 10 are independently selected from the group consisting of hydrogen, and alkyl; and n and p are 0.