You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Could you please return a molecule that adheres to this description? The molecule is a pde4 inhibitor.
user
O=C(Nc1cccnc1)c1c(OC(F)F)ccc2oc3ccc(OC(F)(F)F)cc3c12
assistant