Patent ID: 7544693

Claim:
A compound of formula I: or a pharmaceutically-acceptable salt thereof, wherein: Ar is a moiety of formula II or III: wherein, A is O or S; B is N at one or two occurrences and CR 1 at all other occurrences; R 1 is independently at each occurrence hydrogen, —R 2 , —C 2 -C 6 alkenyl, —C 2 -C 6 alkynyl, halogen, —CN, —NO 2 , —NR 3 R 4 or —OR 5 ; R 2 is an unsubstituted straight-chained, branched, or cyclic C 1 -C 6 alkyl group, or a straight-chained, branched, or cyclic C 1 -C 6 alkyl group substituted with 1, 2, 3, 4 or 5 halogen atoms, and 1 or 2 substituents selected from: C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, —CN, —NR 3 R 4 , or —OR 5 ; R 3 and R 4 are independently at each occurrence hydrogen, R 5 , or in combination at any one occurrence of —NR 3 R 4 are —(CH 2 ) p J(CH 2 ) q — wherein J is O, S, NH, NR 5 or a bond; R 5 is an unsubstituted straight-chained, branched, or cyclic C 1 -C 6 alkyl group, or a straight-chained, branched, or cyclic C 1 -C 6 alkyl group substituted with 1, 2, 3, 4 or 5 halogen atoms; p at each occurrence is 2, 3, or 4; q at each occurrence is 0, 1, or 2.