You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: It belongs to the p2x3 antagonist class of molecules.
user
CCOC(=O)C=CC1CN=C(Nc2ccc(OC(C)C)c(F)c2)N(CC2=CCC(Cl)CC2)C1=O
assistant