Patent ID: 7977506

Claim:
A compound of the formula: wherein R 1 is —OH or —OCH 3 ; R 2 , R 3 , R 4 , and R 5 are independently selected from hydrogen, halogen, —OH, —OCH 3 , C 1 -C 4 alkyl, —NH 2 , —NH(CH 3 ), —N(CH 3 ) 2 , or —NO 2 ; m is 0; R 6 is a phenyl substituted with —O—R 7 —COOH at the ortho, meta, or para position; R 6 is optionally substituted with one or more members selected from halogen, —OH, —OCH 3 , C 1 -C 4 alkyl, —NH 2 , NH(CH 3 ), —N(CH 3 ) 2 , and —NO 2 ; and R 7 is C 2 -C 12 linear alkyl, or C 4 -C 12 branched alkyl, or a pharmaceutically acceptable salt thereof.