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 btk inhibitor and is cancer treatment. Please write the SMILES representation of it.
user
CC(C)(C)OC(=O)N1CCC2(CCN(CCc3ccc(Br)cc3)CC2)CC1
assistant