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 pde4 inhibitor.
user
O=C1CC(C(=O)N(c2ccc3ncccc3c2)C2CCC(n3c(=O)c4cc(F)cnc4n(C4CCSCC4)c3=O)CC2)CN1
assistant