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 and belongs to the copd treatment class of molecules.
user
CN1CCC(COC(=O)C(NCc2ccc(C(=O)OC(Cc3c(Cl)cncc3Cl)c3ccc(OC(F)F)c(OCC4CC4)c3)s2)c2ccccc2)CC1
assistant