You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): The molecule is a btk inhibitor.
user
C=CC(=O)Nc1cc(OC)cc(-c2ccnc(Nc3cccc(N4CCOCC4)c3)n2)c1
assistant