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 based on this description: The molecule is a btk inhibitor.
user
COCCN1CCOC(c2nc(-c3ccc(C(=O)Nc4cc(C(F)(F)F)ccn4)cc3)c3c(N)ncc(C)n23)C1
assistant