You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is a phosphodiesterase inhibitor.
user
COc1ccc(NC2CCc3nc(Cc4ccc(OC)c(F)c4)c4[nH]c5ccccc5c4c3C2)cc1
assistant