You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: It belongs to the p2x3 antagonist class of molecules. Please write the SMILES representation of it.
user
Cc1ccc(-c2cc(OC(=O)NC(C)c3nccs3)cc(-n3cnnn3)c2)c(Cl)c1
assistant