You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a pde4 inhibitor. Use the above information to create a molecule.
user
CCn1nc(-c2cccc(-c3ccc(CCC(=O)NC4CCN(C)CC4)cc3)c2)cc(Nc2cccc3ncccc23)c1=O
assistant