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
Cc1c(-c2ccc(Cl)cc2)c(C(=O)N2CCOCC2)n(CC#CC2CC2)c1C(F)(F)F
assistant