You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule based on this description: The molecule is a phosphodiesterase inhibitor.
user
COC(=O)C(Cc1c(C(=O)c2ccc3c(c2)OCO3)[nH]c2ccccc12)NC(=O)CCl
assistant