You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): It belongs to the pain treatment class of molecules.
user
COc1ccc2cc(C(C)C(=O)OC(C)OC(=O)NCC(CC(=O)O)CC(C)C)ccc2c1
assistant