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 plasma kallikrein inhibitor. Please represent the molecule in SMILES.
user
COC(=O)c1cnc(Cc2ccc(N3CC4C(C3)C4(F)F)nc2C)s1
assistant