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: The molecule is a cb2 agonist and belongs to the pain treatment class of molecules.
user
CC1c2nn(C)c(-c3ccc4c(c3)OCO4)c2CCN1C(=O)c1ccc2ncccc2c1
assistant