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: It belongs to the pain treatment class of molecules. Please write the SMILES representation of it.
user
O=C(O)C1CC(c2ncc(-c3ccccc3)o2)CN1C(=O)C(c1ccccc1)c1ccccc1
assistant