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 phosphodiesterase inhibitor. Please represent the molecule in SMILES.
user
COc1ccc(-c2cccc3c2COC3=O)c(OCC2(CCCCCC(=O)O)CC2)c1OC
assistant