You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a cgrp antagonist and belongs to the migraine treatment class of molecules. Please represent the molecule in SMILES.
user
CCC(=O)OCn1ncc2cc(CC(NC(=O)N3CCC(c4cc5ccccc5n(COC(=O)CC)c4=O)CC3)C(=O)N3CCN(C4CCN(C)CC4)CC3)cc(C)c21
assistant