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 cb1 antagonist class of molecules.
user
CC1(C)CC(NC(=O)C(C)(C)O)c2cc(-c3ccc(Cl)cc3)c(-c3cc(Cl)ccc3C(F)(F)F)nc2O1
assistant