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 p2x7 antagonist and is pain treatment. Use the above information to create a molecule.
user
Clc1cccc(-n2nnnc2NCc2ccccc2N2CCCCC2)c1Cl.NCc1ccccc1N1CCCCC1
assistant