Patent ID: 8722574

Claim:
A compound represented by formula (I): wherein: R 1 and R 4 -R 12 are hydrogen, alkyl, alkoxy or halo, and at least one of R 1 or R 4 -R 8 is alkyl; R 2 is hydrogen or alkyl; R 3 is aryl or substituted aryl; R 13 is hydrogen or alkyl; R 14 -R 18 are hydrogen, alkyl, alkoxy, or halo, wherein at least one of R 14 -R 18 is halo; and X 1 is carbon; with the provision that either (a) R 3 is 4-halophenyl, (b) R 16 is halo, or (c) R 3 is 4-halophenyl and R 16 is halo; with the provision that either (a) R 3 is 4-halophenyl, (b) R 16 is halo, or (c) R 3 is 4-halophenyl and R 16 is halo.