You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Could you please return a molecule that adheres to this description? The molecule is a phosphodiesterase inhibitor.
user
CCC(=O)N1CCC(NC(=O)C2=C(C)NC(c3cc(F)ccc3OCC3CC3)c3cc[nH]c32)CC1
assistant