Patent ID: 8198276

Claim:
A compound of formula I: or a salt thereof; wherein: R 1 , R 2 , R 3 , R 4 , R 5 , R 6 are each independently hydrogen, halo, (C1-C3) alkyl, (C1-C3) alkoxy, and (C1-C3) alkylamino; R 7 is hydrogen, halo, (C1-C6) alkyl, (C1-C6) alkoxy, and (C1-C6) alkylamino wherein the alkyl is optionally substituted by one or two groups that are independently hydroxyl, (C1-C3) alkoxy, and (C1-C3) alkylamino; R 8 is C(O)NR 9 R 10 or NHR 11 ; R 9 and R 10 are each independently hydrogen, (C1-C6) alkyl, (C3-C8) cycloalkyl, (C3-C8) heterocyclyl, or R 9 and R 10 together with the nitrogen they are attached to form a (C3-C8) heterocycle; R 11 is a (C3-C8) cycloalkyl substituted by 1, 2, 3, or 4 groups that are independently oxo, hydroxyl, (C1-C6)alkyl, (C1-C3) alkoxy, (C1-C3) alkylamino, heterocycle, amide, hydroxyl(C1-C6) alkyl, or (C1-C3)alkoxy(C1-C3)alkyl; or R 11 is a (C3-C8) heterocycle substituted by 2, 3, or 4 groups that are independently oxo, hydroxyl, (C1-C6 ) alkyl, (C1-C3) alkylamino, heterocycle, amide, hydroxyl(C1-C6)alkyl, or (C1-C3)alkoxy(C1-C3) alkyl; X 1 , X 2 are each independently N or CR 4 .