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: It belongs to the p2x7 antagonist class of molecules.
user
Cc1ncsc1C(CNC(=O)c1c(F)cccc1Cl)N1CCc2ccccc2C1
assistant