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
CN(C(=O)c1cccc2ccccc12)c1nc2n(c1OC(=O)NC1CCCCC1)CCCC2
assistant