Patent ID: 7531669

Claim:
A compound comprising the structure corresponding to Formula (II): wherein: m is 1, n is 1, X 1 is N or NR 3 , X 2 is N or NR 3 , X 4 is CH, one R is -L 1 -Ar 1 , one R is -L 2 -Ar 2 , L 1 and L 2 are —CH═CH—, Ar 1 and Ar 2 are independently selected from the group consisting of phenyl, 4-hydroxyphenyl, 3-hydroxyphenyl, 3,4-dihydroxyphenyl and 3-methoxy, 4-hydroxy phenyl, and R 3 is selected from the group consisting of phenyl, isobutyl, 2-fluorophenyl, 3-fluorophenyl, 4-fluorophenyl, 3-nitrophenyl, 4-methoxyphenyl, 4-trifluoromethylphenyl, and 2,5-difluorophenyl.