You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is a proteasome inhibitor. Please write the SMILES representation of it.
user
CCOC(=O)C1(Cc2ccc(Cl)cc2)CC(CNC(=O)OC(C)(C)C)=NO1
assistant