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=C(C#N)C(=O)N1CC(n2nc(-c3cc(O)cc(F)c3)c3c(N)ncnc32)Cc2ncccc21
assistant