You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule based on this description: The molecule is a phosphodiesterase inhibitor.
user
CCn1nc(CCCOC(=O)c2cccc(C(=O)N(C)C)c2)c2c1C(=O)NCC1(CCOCC1)C2
assistant