Patent ID: 8232299

Claim:
A compound of the general formula I wherein n is 4; three of the X substituents are halogen and the fourth X substituent is a heterocyclic or —N—(R 1 , R 2 ) group, wherein each of R 1 and R 2 independently is hydrogen, an aminoethyl group, or an un-substituted or halogen-substituted group selected from a straight or branched alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, and a heterocyclic group; or R 1 and R 2 together with the nitrogen in between them form a 5 or 6 member ring; A is a single bond, —O—, —S— or —NH—; Y is O or S; Z is O or S; and R′ and R″ are isopropyl groups.