You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: The molecule is a btk inhibitor.
user
COC(=O)C1CCCN(C2=C3C=NC=C[N+]3(NCc3ccc(OC)cc3)C(Br)=N2)C1
assistant