You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Could you please return a molecule that adheres to this description? The molecule is a phosphodiesterase inhibitor, a pde4 inhibitor, and a copd treatment.
user
CCn1ncc2c(NC3CCN(C(N)=O)C3)c(C(=O)NC(C)c3ccc(C)cc3)cnc21
assistant