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.
user
COc1ccc(-c2ccc3c(c2)COC3=O)c(OCC2(C(=O)OC(C)C)CCC2)c1OC
assistant