You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Give me a molecule that satisfies the conditions outlined in the description: The molecule is a member of the p2x3 antagonist class and affects pain treatment.
user
CC(=O)Oc1cc(C(=O)N(Cc2cccc(Oc3ccc(Cl)cc3)c2)C2CCCc3ccccc32)c(C(=O)O)cc1C(=O)O
assistant