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=C1c2ccccc2C(=O)N1OC1CCN(C(c2ccc(F)cc2)c2ccc(F)cc2)CC1
assistant