You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a integrin antagonist.
user
O=C(O)C(CCC(=O)N1CCC(CCOC(=O)N2CCCC2)CC1)NC(=O)C1CCCN1S(=O)(=O)c1cc(Cl)cc(Cl)c1
assistant