You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: It belongs to the cgrp antagonist class of molecules.
user
O=C(NCC(=O)N1CCC(N2CCc3ccccc3NC2=O)CC1)c1ccc2cn[nH]c2c1
assistant