Patent ID: 7326707

Claim:
A compound having the structure: or a stereoisomer or pharmaceutically acceptable salt thereof, wherein R 1 is -L 1 -J; R 2 is (CH 2 ) y —W; R 3 is -L 2 -Q; L 1 is a linker selected from the group consisting of —(CH 2 ) y —, —O—(CH 2 ) y —, —O—, —NH—(CH 2 ) y —, —(C═O)(CH 2 ) y —, —(C═O)—O—(CH 2 ) y — and —CH 2 (C═O)NH—; J is a ring structure selected from the group consisting of substituted or unsubstituted aromatic carbocyclic rings, substituted or unsubstituted non-aromatic carbocyclic rings, substituted or unsubstituted aromatic fused carbobicyclic ring groups, substituted or unsubstituted aromatic carbocyclic ring groups wherein the rings are joined by a bond or —O—, and substituted or unsubstituted aromatic fused heterobicyclic ring groups; wherein in each instance the rings comprise 5 or 6 ring atoms; W is a heteroatom unit with at least one cationic center, hydrogen bond donor or hydrogen bond acceptor wherein at least one atom is N; L 2 is a linker selected from the group consisting of Q is an aromatic carbocyclic ring selected from the group consisting of phenyl, substituted phenyl, naphthyl and substituted naphthyl; R 4 is a unit selected from the group consisting of an amine capping group, an amino acid residue, and an amino acid residue with an amine capping group; X is C═O; z is 0; and y is at each occurrence independently from 1 to 6.