You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): It belongs to the pain treatment class of molecules.
user
CCC(O)c1cnc(N2CCN(c3nc4c(-c5cc(F)c(F)c(F)c5)cc(C(F)(F)F)cc4[nH]3)C(C)C2)c(C(F)(F)F)c1
assistant