You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Can you create a molecule that matches the given characteristics? The molecule is a cgrp antagonist.
user
Cn1cc(C(=O)c2cc(N3CCC(n4c(=O)[nH]c5ncccc54)CC3)ncn2)c2cc(F)ccc21
assistant