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 both a cancer treatment and a proteasome inhibitor. Use the above information to create a molecule.
user
O=C(OC1Cc2ccccc2CC1OC(=O)c1cccc(Br)c1)c1cccc(Br)c1
assistant