You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: The molecule is a pde2 inhibitor.
user
CC(=O)N1CCc2cc(C(=O)N3CCCC(C)(c4ccnc5ncnn45)C3)ccc21
assistant