You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is a p2x7 antagonist and is pain treatment. Please write the SMILES representation of it.
user
COc1cn(Cc2cc(F)cc(F)c2)c(Nc2cc3c(cc2C)OCO3)nc1=O
assistant