Patent ID: 7423155

Claim:
A compound according to Formula Ia: wherein R 8 is hydrogen, alkyl, or aryl; L 1 is an oxy, —C(R a ) 2 —, or —NR a — where R a is hydrogen, alkyl, or aryl; Y 3 is a divalent group of formula —Ar 1 —Y 3a — where Ar 1 is an arylene bonded to the sulfonyl group and Y 3a is selected from a single bond, alkylene, heteroalkylene, arylene, carbonyl, carbonyloxy, carbonylimino, oxy, thio, —NR a —, or combinations thereof, wherein R a is hydrogen, alkyl, or aryl; R 1 and R 2 together with a dicarboximide group to which they are attached form a four to eight membered heterocyclic or heterobicyclic group that can be fused to an optional aromatic group, optional saturated or unsaturated cyclic group, or optional saturated or unsaturated bicyclic group; and said compound is unsubstituted or substituted with a halo, alkyl, alkoxy, or combinations thereof.