Patent ID: 8846737

Claim:
A compound of formula V wherein each of R 2 , R 3 , R 5 and R 6 is independently selected from —H, NO 2 , halo, —CN, —NR 12 R 13 , and —(CH 2 ) 0-1 R 14 ; wherein at least one of R 2 , R 3 , R 5 and R 6 is —(CH 2 ) 0-1 R 14 ; wherein R 12 and R 13 are independently selected from H, linear or branched hydrocarbon groups having a carbon chain of from 1 to 10 carbon atoms; wherein R 14 is an unsubstituted or substituted phenyl group; wherein R 4 is —CN; wherein R 9 is —OSO 2 NR 15 R 16 ; wherein each of R 7 , R 8 , R 10 and R 11 is independently selected from —H, (C 1 -C 6 )alkyl, —OH, —OSO 2 NR 15 R 16 , and halo; and wherein R 15 and R 16 are independently selected from H, alkyl, cycloalkyl, alkenyl, acyl and aryl, or combinations thereof, or together represent alkylene, wherein the or each alkyl or cycloalkyl or alkenyl optionally contain one or more hetero atoms or groups.