You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a pain treatment. Use the above information to create a molecule.
user
Cc1cc(N2CCC(N(C)C(=O)c3ccc4c(c3)C(N(C)C(=O)Nc3ccccc3Cl)CC4)CC2)cc(C)n1
assistant