You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a pain treatment. Please represent the molecule in SMILES.
user
CCCCN(CCCC)C(=O)c1ccc2nc(NCCCSC)n(CCCN3CCCCC3)c2c1
assistant