You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: It belongs to the p2x3 antagonist class of molecules. Please represent the molecule in SMILES.
user
CNc1ncc(Nc2ccc(OC(C)C)cc2)c(Cc2ccc(Cl)cc2)n1
assistant