E (c (RGDfK) ) 2

E (c (RGDfK) ) is an αvβ3 integrin-specific binding moiety with tumor-targeting properties, demonstrating increased uptake in human ovarian cancer OVCAR-3 xenograft tumors, suggesting potential utility in cancer research [1].

C([C@@H]1C(=O)N[C@@H](CCCCNC([C@H](CCC(NCCCC[C@@H]2NC(=O)[C@@H](CC3=CC=CC=C3)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CCCNC(=N)N)NC2=O)=O)N)=O)C(=O)N[C@@H](CCCNC(=N)N)C(=O)NCC(=O)N[C@@H](CC(O)=O)C(=O)N1)C4=CC=CC=C4