Patent ID: 7311892

Claim:
A compound comprising a plurality of tripartite molecules linked to a scaffold moiety, with each tripartite molecule comprising a targeting molecule for directing the compound to a defined population of cells, a therapeutic agent and a scaffold binding element capable of complementary interaction with the scaffold moiety, each of the targeting molecule, the therapeutic agent and the scaffold binding element being joined by a linker molecule to a central core molecule, wherein said scaffold moiety is selected from the group consisting of avidin and streptavidin, said scaffold binding element is biotin, said linker molecule is polyethylene glycol, said central core molecule is selected from the group consisting of lysine and diamino benzoic acid, said targeting molecule is selected from the group consisting of SEQ ID NO. 1, SEQ ID NO. 2 and SEQ ID NO. 3, said targeting molecule being the same or being different for each tripartite molecule, and said therapeutic agent is selected from the group consisting of paclitaxel and toxotere, said therapeutic agent being the same or being different for each tripartite molecule.