You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a p2x3 antagonist. Use the above information to create a molecule.
user
COCCOC1N=CCCC1C1C(C(=O)C(C)C)=C(O)C(=O)N1c1ccc(SC)cc1
assistant