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 jak inhibitor.
user
C=CC(=O)N1CCN(CCn2c(=O)ccc3cnc(Nc4ccn(C(C)C)n4)nc32)C(CC)C1
assistant