You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is a pde2 inhibitor. Please write the SMILES representation of it.
user
CCC(c1ccc(C(F)F)cc1F)n1nc(CF)c2c(=O)[nH]c(N(C)C)nc21
assistant