You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is both a thrombin inhibitor and a serine protease inhibitor. Please write the SMILES representation of it.
user
O=C(c1ccccc1N1CCOCC1)n1ccc(-c2cccn(Cc3ccco3)c2=O)n1
assistant