You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: The molecule is a phosphodiesterase inhibitor.
user
CCc1nn(CC(C)COC(=O)c2ccc(C(=O)N3CCCCC3)cc2)c2c1C(=O)NCC1(CCOCC1)C2
assistant