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
COc1cccc(C2=CCN(c3ncn(Cc4ccc(Cl)s4)c(=O)n3)CC2O)n1
assistant