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 hcv protease inhibitor.
user
C=CCNC(=O)C(=O)C(CCC)NC(=O)C1CCCN1C(=O)C(NC(=O)OCC(C)C)C1CCCC1
assistant