You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: It belongs to the pain treatment class of molecules.
user
C[N+]1(CCNC(=O)c2cc(-c3ccc(Oc4ccc(F)cc4)cc3)ccn2)CCOCC1
assistant