Patent ID: 6979738

Claim:
A compound of the formula: wherein each of rings A and B, independently, is heteroaryl containing at least one nitrogen atom; each of X and Y, independently, is CH or N; each of R 1 –R 6 , independently, is H, C 1 –C 8 alkyl, C 2 –C 8 alkenyl, C 2 –C 8 alkynyl, C 3 –C 8 cycloalkyl, C 3 –C 8 heterocycloalkyl, aryl, heteroaryl, OH, C 1 –C 6 alkoxy, aryloxy, heteroaryloxy, NH 2 , C 1 –C 6 alkylamino, C 1 –C 12 dialkylamino, arylamino, diarylamino, or halogen; R 7 is H; and each of m and n, independently, is 1, 2, or 3.