You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a pain treatment and belongs to the p2x7 antagonist class of molecules. Use the above information to create a molecule.
user
COc1cnc(NC2=C(C)C(Cl)=CCC2)n(Cc2ccccc2Cl)c1=O
assistant