Patent ID: 7381722

Claim:
A compound having the formula: or a pharmaceutically acceptable salt thereof wherein one of the R 1 , R 2 , R 3 and R 4 groups is —NH(CH 2 ) n —N(R 5 )(R 6 ) and the remaining groups are simultaneously —H; R 5 and R 6 are independently —H, —C 1 -C 6 alkyl, or -phenyl, wherein the —C 1 -C 6 alkyl, or -phenyl, is unsubstituted or substituted with one or more of -halo, —OH or —N(Z 3 )(Z 4 ), where Z 3 and Z 4 are independently —H or —C 1 -C 5 alkyl, which is unsubstituted or substituted with one or more of -halo, -hydroxy or —NH 2 ; or N, Z 3 and Z 4 are taken together to form an nitrogen-containing 3- to 7-membered monocyclic heterocycle which is unsubstituted or substituted with one to three of —C 1 -C 5 alkyl, -halo, -halo-substituted C 1 -C 5 alkyl, hydroxy, —O—C 1 -C 5 alkyl, —N(R a ) 2 , —COOH, —C(O)O—(C 1 -C 5 alkyl), —OC(O)—(C 1 -C 5 alkyl), —C(O)NH 2 , or —NO 2 , wherein each occurrence of R a is independently —H, -benzyl, or —C 1 -C 10 alkyl; or N, R 5 and R 6 are taken together to form a nitrogen-containing 3- to 7-membered monocyclic heterocycle which is unsubstituted or substituted with one to three of —C 1 -C 5 alkyl, -halo, halo-substituted C 1 -C 5 alkyl, hydroxy, —O—C 1 -C 5 alkyl, —N(R a ) 2 ,—COOH, —C(O)O—(C 1 -C 5 alkyl), —OC(O)—(C 1 -C 5 alkyl), —C(O)NH 2 , or —NO 2 , wherein each occurrence of R a is independently —H, benzyl, or —C 1 -C 10 alkyl; and n is an integer ranging from 2 to 6.