You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Can you create a molecule that matches the given characteristics? The molecule is a pde4 inhibitor.
user
CCOC(C)(C)C(=O)N1CCN(C(=O)c2nc(-c3ccc(OC)c4nc(C(F)(F)F)ccc34)oc2C(C)N)CC1
assistant