You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: It belongs to the pain treatment class of molecules.
user
O=C(CCc1ccccc1)NC1CC(C(=O)O)N(C(=O)C(c2ccccc2)c2ccccc2)C1
assistant