You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is a pain treatment.
user
COCC(C)N1CCn2cc(C(=O)N3CCCC34CCN(C(=O)OC(C(F)(F)F)C(F)(F)F)CC4)nc2C1
assistant