Patent ID: 8338401

Claim:
A compound represented by formula (I) wherein R 3 is CONHR 9 , wherein R 9 is un-substituted or mono- or multi-substituted phenyl wherein the substituent is selected from the group consisting of hydroxyl, C 1 -C 8 alkoxyl, CF 3 , carboxyl, alkyloxycarbonyl, OCH 2 CO 2 H, NO 2 , halogen, SO 3 H, SO 2 NHR 11 , wherein R 11 is selected from the group consisting of hydrogen, amidino, 2″-thiazolyl, 3″-(5″-methylisooxazolyl), 2″-pyrimidinyl, 2″-(4″,6″-dimethylpyrimidinyl), and 4″-(5″,6″-dimethoxypyrimidinyl); R 4 is hydrogen; R 5 is selected from the group consisting of H and C 1 -C 4 alkyl; R 6 is selected from the group consisting of H, C 1 -C 12 alkyl, halogen, NO 2 , and CONHR 13 , wherein R 13 is substituted phenyl; R 7 is selected from the group consisting of hydroxyl, C 1 -C 4 alkyl and alkoxyl; R 8 is selected from the group consisting of H, C 1 -C 4 alkyl or alkoxyl, and NO 2 ; and when R 5 , R 6 and R 8 are H, R 7 is OCH 3 ; or a pharmaceutically acceptable salt or hydrate thereof.