You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Give me a molecule that satisfies the conditions outlined in the description: The molecule is a pde4 inhibitor.
user
Nc1ccn(-c2cc(F)cc(-c3cc(Cl)c4c(n3)CCC4)c2)c(=O)n1
assistant