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
CSc1cccc(Oc2ncc(F)cc2C(=O)NC2CCC(NC(=O)CCCCCl)CC2)c1
assistant