You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a pde2 inhibitor. Use the above information to create a molecule.
user
CN(C(=O)c1cnc2c(F)cccc2c1)C1CC(=Cc2cc(C(F)F)nc3ncnn23)C1
assistant