You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: It belongs to the pain treatment class of molecules.
user
Cc1nc(N2CCc3c(Cl)ccc(Cl)c3C2)nc(=O)n1Cc1ccc(C(F)(F)F)s1
assistant