Patent ID: 8809368

Claim:
A compound having the following formula: where Ar is o-, m- or p-C 6 H 4 CF 3 ; R A and R B are independently selected from the group consisting of: hydrogen, —(CH 2 ) n —(X) m —Y, where n is an integer from 0-6; m is an integer from 0-2; X is independently —O—, —C(═O)—, —C(═NH)—, —S—, —S(═O)—, —SO 2 —; and Y is selected from the group consisting of: hydrogen, C1-C6 alkyl groups and nitrogen containing groups comprising —NH 2 ; —NO 2 ; —CN; phthalimide; imidazole; pyrazole; pyridine; pyrimidine; pyrazine; and pyridazine, provided that R A and R B are not both hydrogen.