You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is pain treatment. Please write the SMILES representation of it.
user
CNC(=O)C1CCC[N+]1(C)C(=O)c1ccc2cc(Oc3ccc(C(F)F)cn3)ccc2n1
assistant