Patent ID: 7232824

Claim:
A compound of the formula: or the pharmaceutically acceptable salts thereof; wherein each of Z 5 , Z 6 , Z 7 and Z 8 is N or CH and wherein two Z 5 , Z 6 , Z 7 and Z 8 are N and wherein two adjacent Z positions cannot be N; wherein m and n are each independently 0–3; wherein each R 1 is independently OH, SH, NH 2 , OR, SR, NHR, halo or R-halide; wherein two adjacent R 1 groups may be joined to form an aliphatic hetero cycle ring of 5–6 members; wherein each R 2 is independently R, halo, R-halide, OR-halide, NH 2 , CONH 2 or CONHR; wherein R is optionally substituted C 1 –C 12 alkyl, C 1 –C 12 alkenyl, C 1 –C 12 alkynyl, or aryl C 1 –C 12 alkyl, containing 0–4 heteroatoms in place of a carbon in the carbon backbone, where the optional substituents are ═O, ═N, or OH; and wherein R 3 is H or CH 3 ; with the provio that when Z 5 and Z 8 are N and Z 6 and Z 7 are CH, when R 3 is H, and when the pyridyl is unsubstituted, then the phenyl is substituted.