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
Cc1oc2ccc(OCc3cccnc3Cl)cc2c1C(=O)NC1CCN(C(=O)OC(C)(C)C)CC1(F)F
assistant