You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule based on this description: The molecule is a proteasome inhibitor.
user
CC(NC(=O)N(CC(=O)N1CCCCC1C)NC(=O)CCC(C)(C)C)C(=O)NCc1ccc(F)cc1F
assistant