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 that fulfills the requirement: The molecule is a btk inhibitor.
user
C=CC(=O)N1CCCC1C(=O)Nc1cccc(Nc2ncc3cc(-c4c(C)cc[nH]c4=O)ccc3n2)c1
assistant