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 that fulfills the requirement: The molecule is a btk inhibitor and is cancer treatment.
user
Cc1c(-c2nc3nccc(-c4ccc5c(c4)CCCCC5NC(=O)c4nnc(C(C)(C)C)o4)c3[nH]2)cnn1C1CCOCC1
assistant