You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: The molecule is a proteasome inhibitor.
user
CC(C)CC(NC(=O)OC(C)(C)C)C(=O)O.CC(Nc1cccc2ccccc12)C(=O)O
assistant