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 pde4 inhibitor that impacts asthma treatment.
user
O=C(Cl)c1ccc(OC(F)F)c2oc3ccc([N+](=O)[O-])cc3c12
assistant