You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a pde4 inhibitor.
user
C=Nc1c(Oc2ccc(C(C)(F)F)cn2)ccc(-c2nccs2)c1OCC1CC(CNC)N1
assistant