Patent ID: 7071225

Claim:
A compound represented by Formula I: wherein R 1 and R 2 are independently chosen from hydrogen or an alkyl group and R 3 is C 1-3 alkyl; R 4 is H or OR 1 ; R 5 is OCON(R 1 ,R 2 ), OCOR 1 , or OR 7 ; R 6 is H, OR 7 , CONR 1 R 2 , CH 2 OR 7 , CO 2 R 1 R 2 , N(R 1 R 2 ), with the proviso that both R 5 and R 6 are not H; Aryl is at least one aryl group; A is chosen from hydrogen, an alkyl group, C(═O)OR 7 , OR 7 , CR 7 , C(═O)NR 1 R 2 , SO 2 (NR 1 R 2 ), halogen, or CF 3 ; and R 7 is H, a substituted or unsubstituted alkyl group, C 1-3 CONR 1 R 2 , C 1-3 N(R 1 R 2 ), C 1-3 CO 2 H, or C 1-3 CO 2 C 1-3 alkyl, with the proviso that when R 1 , R 2 , and R 4 each are hydrogen, R 5 and R 6 do not represent OR 7 at the same time.