You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: It belongs to the pain treatment class of molecules.
user
O=C(NCc1nc(-c2ccc(C(F)(F)F)cc2)cs1)C1CCCN1S(=O)(=O)c1cccc(F)c1
assistant