You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: It belongs to the pain treatment class of molecules.
user
CNCCC(OCc1cccc(N2CCN(C)c3nc(N(C)Cc4cccnc4)ncc3C2=O)c1)c1ccccc1
assistant