Patent ID: 7179794

Claim:
A compound of the formula: L′-X′-L″ or a pharmaceutically-acceptable salt thereof; wherein L′ is a moiety of the formula: L″ is a moiety of the formula: X′ has the formula: —X a Z-(Y a -Z) m -Y b -Z-X a — wherein m is an integer of from 0 to 20; X a at each separate occurrence is selected from the group consisting of —O—, —S—, —NR—, —C(O)—, —C(O)O—, —C(O)NR—, —C(S), —C(S)O—, —C(S)NR— and a covalent bond, where R is as defined below; Z at each separate occurrence is selected from the group consisting of alkylene, substituted alkylene, cycloalkylene, substituted cylcoalkylene, alkenylene, substituted alkenylene, alkynylene, substituted alkynylene, cycloalkenylene, substituted cycloalkenylene, arylene, heteroarylene, heterocyclene, and a covalent bond; Y a and Y b at eaeh separate occurrence are selected from the group consisting of —C(O)NR′—, —NR′C(O)—, —NR′C(O)NR′—, —C(═NR′)—NR′—, —NR′—C(═NR′)—, —NR′—C(O)O—, —P(O)(OR′)—O—, —S(O) n CR′R″—, —S(O) n NR′—, —S—S— and a covalent bond; where n is 0, 1 or 2 and R, R′ and R″ at each separate occurrence are selected from the group consisting of hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, alkenyl, substituted alkenyl, cycloalkenyl, substituted cycloalkenyl, alkynyl, substituted alkynyl, aryl, heteroaryl and heterocyclic.