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
CCn1nc(C(=O)N2CCc3cc(OC)c(C(F)(F)F)cc32)c2c(NC3CCOCC3)ccnc21
assistant