Cyclic peptides that bind to receptor plasminogen activator urokinase.

The present invention relates to compounds cyclic peptide POSSESS 11 amino acids STATES REFERRED BY A LIAISON (L) unit so that the linear dimension between carbon C AL the first amino acid and carbon LIME ELEVENTH amino acid is between 4 and 12 Angstrom units. These compounds are useful for inhibiting uPA LINK TO RECEIVER uPAR. This invention relates also about methods of using these compounds and cyclic peptide compositions containing them that inhibit the proliferation or metastasis of cancerous tumors.