You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule based on this description: The molecule is a btk inhibitor.
user
C=CC(=O)N1CCCC(Oc2n[nH]c3nccc(Nc4cccc(C(=O)Nc5ccc(C(C)C)c(C)c5)c4)c23)C1
assistant