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 thrombin inhibitor.
user
Nc1nc(Nc2cc(Cl)ccc2Cc2cccnc2)n[nH]1
assistant