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 member of the cb2 agonist class.
user
O=C(c1ccc(OCC(F)(F)F)nc1)N1CCC(O)(c2ccccc2)C2CCCCC21
assistant