Patent ID: 8093279

Claim:
A compound of Formula I wherein R 3 , R 4 , R 5 , R 6 and R 7 are independently selected from H and —Y—R 8 wherein each R 8 is independently selected from cyano (—CN) and substituted and unsubstituted 5 membered ring systems comprising carbon and one, two, or three hetero atoms selected from nitrogen, sulphur, and oxygen; wherein at least one of R 3 , R 4 , R 5 , R 6 and R 7 is —Y—R 8 in which R 8 is selected from substituted and unsubstituted heterocyclic rings and amino substituted phenyl groups, wherein X is a bond or a group selected from an alkyl group, an alkenyl group, an alkynl group, an aryl group, an alkoxy group, and oxyalkenyl group, an oxyalkynyl group, and oxyaryl group, COO, CO, S, O, SO, SO 2 , NR, and SO 2 NR, wherein R is selected from H, an alkyl group, an alkenyl group, an alkynyl group and an aryl group; wherein Y is an optional group selected from an alkyl group, an alkenyl group and an alkynly group; and wherein ring A is optionally further substituted wherein R 9 is —OSO 2 NR 1 R 2 wherein R 1 and R 2 are H wherein (a) X is a bond and at least one of R 3 , R 4 , R 5 , R 6 and R 7 is —Y—R 8 ; OR (b) four of R 3 , R 4 , R 5 , R 6 and R 7 are H and one of R 3 , R 4 , R 5 , R 6 and R 7 is —Y—R 8 .