You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a btk inhibitor and is cancer treatment. Please represent the molecule in SMILES.
user
Cn1cc(-c2nc3nccc(-c4ccc5c(c4)CCCCC5NC(=O)N4CC(OC(C)(C)C)C4)c3[nH]2)cn1
assistant