You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a p2x7 modulator.
user
O=C(Cc1ccc(C(F)(F)F)c(F)c1)Nc1cccc2c1CCN(C(=O)CC1CCCCC1)C2
assistant