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 phosphodiesterase inhibitor and is copd treatment.
user
O=C(OC(Cc1c(Cl)c[n+]([O-])cc1Cl)c1ccc(OC(F)F)c(OCC2CC2)c1)C1SCCN1CC1CC1
assistant