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
COc1ccc(C2=NN(C3CCN(CCC=O)CC3)C(=O)C(C)(C)C2)cc1OC.Cl
assistant