You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a integrin antagonist. Please represent the molecule in SMILES.
user
Cc1nc(NCC(NC(=O)OCc2ccccc2)C(=O)OC(C)(C)C)c(C)c(N2CCC(c3ccc4cccnc4n3)CC2)n1
assistant