You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a pde4 inhibitor and belongs to the copd treatment class of molecules. Please represent the molecule in SMILES.
user
CCc1nc2c(cnn2CC)c(NC2CCOCC2)c1CNC(=O)c1ccc(CCCCOCCCCBr)cc1
assistant