You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: It belongs to the p2x3 antagonist class of molecules.
user
CC(=O)N(C)C1CN(C(=O)NCc2ccc(C(F)(F)F)cc2)N=C1c1ccc(C)cc1
assistant