You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: The molecule is a jak inhibitor.
user
C=CC(=O)N1CCCC(n2cc(Nc3ncc(C(N)=O)c(Nc4ccccc4CC)n3)cn2)C1
assistant