You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a btk inhibitor.
user
C=CC1OC(=O)N2CC(C(=O)NCc3nccnc3Cl)CCC12
assistant