Patent ID: 7745445

Claim:
A compound of Formula Ia: in which Z 1 , Z 2 and Z 3 are members independently selected from CH and N; L 1 is selected from —CH 2 O—, —OCH 2 —, —CH 2 S— and —SCH 2 —; R 6 and R 7 are independently selected from —R 10 and —YR 10 ; wherein Y is propenylene; and R 10 is selected from phenyl, biphenyl, naphthyl, benzo[b]furanyl, pyridinyl, pyrimidinyl, dibenzo-furan-2-yl, furanyl, benzo[b]thiophene, thienyl and quinolinyl; wherein any aryl or heteroaryl of R 10 is optionally substituted with 1 to 3 radicals independently selected from halo, cyano, methyl, hydroxy-methyl, methyl-sulfanyl, methoxy, trifluoromethyl, trifluoromethoxy, phenoxy, ethyl-sulfonyl and dimethylamino.