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
CCC(c1cc(-c2cccc(COc3ccccc3CC(=O)Cc3ccccc3)c2)c2ncccc2c1)S(C)(=O)=O
assistant