You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a proteasome inhibitor. Use the above information to create a molecule.
user
Cc1ccc(CNC(=O)C(CC2CCN(C(=O)C(C#N)=CC(C)C)CC2)NC(=O)C(NC(=O)c2cc(C)no2)C(C)O)c(F)c1
assistant