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 cgrp receptor antagonist and belongs to the migraine treatment class of molecules. Use the above information to create a molecule.
user
O=C(O)Cc1nnc(-c2cc(Cl)cc(C3=CCN(CC(F)(F)F)CC3)c2)o1.[Li]
assistant