You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: The molecule is a btk inhibitor.
user
CC(NC(=O)OC(Cc1ccccc1)c1ccccc1)c1nc(Br)c2c(N)nccn12
assistant