Patent ID: 8802975

Claim:
A compound represented by Formula (I) wherein R 1 to R 6 are independently selected from H, C 1 -C 6 alkyl group, C 1 -C 6 ether group, and amino group substituted by C 1 -C 6 alkyl group; Ar 1 is selected from wherein R 9 and R 10 are independently selected from H, F, C 1 -C 6 alkyl group, and C 1 -C 6 ether group; Ar 2 is selected from wherein X is O, S, or Se, and R 11 and R 12 are independently selected from H, C 1 -C 6 alkyl group, cyano group, and phenyl group; and R 7 and R 8 are independently selected from cyano group, nitro group, and C 1 -C 8 ester group of carboxylic acid.