You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: It belongs to the pain treatment class of molecules.
user
COc1ccc2c(c1)C13CCN(CC4CC4)C(C2)C1OCC(NS(=O)(=O)c1ccc(Cl)cc1)C3
assistant