You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Give me a molecule that satisfies the conditions outlined in the description: The molecule is a btk inhibitor.
user
C=CC(=O)NCCn1cnc2c(NCc3ccccc3)nc(Nc3ccc(N4CCOCC4)cc3)nc21
assistant