You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a pain treatment and belongs to the cb2 agonist class of molecules. Please represent the molecule in SMILES.
user
OC1(c2ccccc2)CCN(Cc2ccnc3ccccc23)C2CCCCC21
assistant