Described herein are compounds of Formula (I): or a salt thereof wherein: Rl and R 5 are independently selected from H, OH and alkoxy R2-R4 and R6-Rs are independently selected from H, OH, F, CI, Br, and I and Rio are independently se lected from H, alkyl, alkenyl, alkynyl, and aryl with the proviso that: at least one of Rl and R5 is OH or alkoxy and at least one of R2-R4 and R6 -Rs is F, CI, Br or I compositions comprising said compounds and methods of making and using the same.
