You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): It belongs to the cgrp antagonist class of molecules.
user
CC(C)(C)OC(=O)ON1CCC(C2CCN(C(=O)C(Cc3ccc(Cl)c(Cl)c3)OC(=O)N3CCC(N4CCc5ccccc5NC4=O)CC3)CC2)CC1
assistant