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 factor xia inhibitor. Please represent the molecule in SMILES.
user
C=CCC(NC(=O)OC(C)(C)C)c1cc(-c2ccc(NC(=O)OC)cc2NC(=O)C(C)C=C)cc(=O)n1C
assistant