You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): It belongs to the p2x3 antagonist class of molecules.
user
CC(C)(Cn1c(=O)nc(Nc2cccc(Cl)c2)n(Cc2ccc(Cl)cc2)c1=O)C(=O)O
assistant