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 proteasome inhibitor. Please represent the molecule in SMILES.
user
CC1CC(C(=O)NC(CC(=O)N2CCCC2c2ccccc2)C(=O)NC(C)C2NCC(Cc3ccccc3)(C3CCCCCC3)N2)(C2CCCCCCC2)NO1
assistant