You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is a btk inhibitor. Please write the SMILES representation of it.
user
Nc1nccn2c(C3CCn4c(nnc4C(F)(F)F)C3)nc(-c3ccc(C(=O)Nc4cc(C(F)(F)F)ccn4)cc3)c12
assistant