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
C=CC(=O)Nc1cccc(-n2cnc3c(N(Cc4ccccc4)Cc4ccccc4)nc(Cl)nc32)c1
assistant