Patent ID: 7807696

Claim:
A compound of Formula (I) or a pharmaceutically acceptable salt thereof: wherein: Ar 1 and Ar 2 are independently a monocyclic six-member optionally substituted heteroaryl group; A 1 is ═N— or —NR a — and A 2 is O or S; R a is H or C1-C6 alkyl; R 1 is selected from —H, C1-C6 alkyl, phenyl, C1-C6 haloalkyl, halogen, —OH, —OR b , C1-C6 hydroxyalkyl, C1-C6 alkoxyalkyl, —O(C1-C6 haloalkyl), —SH, —SR b , —NO 2 , —CN, —NR b CO 2 R b , —NR b C(O)R b , —CO 2 R b , —C(O)R b , —C(O)N(R b ) 2 , —OC(O)R b and —NR b R b ; and each R b is H or a C1-C6 alkyl group.