Patent ID: 7396856

Claim:
A compound represented by Formula I: wherein R 1 , R 2 , R 3 are independently chosen from hydrogen or C 1-3 alkyl; R 4 is chosen from R 1 or OR 1 ; R5 is chosen from hydrogen, F, Cl, OCONR 1 R 2 , OCOC 1-3 alkyl, or OR 7 ; R 6 is chosen from OR 7 , OCONR 1 R 2 , OCOC 1-3 alkyl; R 7 is chosen from hydrogen, C 2-4 alkylCONR 1 R 2 , C 2-4 alkylNR 1 R 2 , C 2-4 alkylCO 2 H, C 2-4 alkylCO 2 C 2-4 alkyl, C 1-3 alkyl; wherein for R 4 ,R 5 ,R 6 and R 7 , R 1 and R 2 are as defined above; and X and Y are independently chosen from C or O, provided that if one of X or Y are O, the other is C; or pharmaceutically acceptable salts of the compounds of Formula I.