You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a cgrpantagonists and belongs to the cgrp antagonist class of molecules.
user
O=C(O)CC1CCC(N2CCN(C(=O)C(Cc3ccc(O)c(Br)c3)OC(=O)N3CCC(N4CCc5ccccc5NC4=O)CC3)CC2)CC1
assistant