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
CCn1c(=O)nc(Nc2ccc(Oc3ccc(C(N)=O)cn3)cc2)n(Cc2ccc(C)cc2)c1=O
assistant