You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
It belongs to the cgrpantagonists class of molecules. Use the above information to create a molecule.
user
CC(c1ccc2[nH]ncc2c1)C(OC(=O)N1CCC(N2CCc3ccccc3NC2=O)CC1)C(=O)N1CCC(C2CCN(S(N)(=O)=O)CC2)CC1
assistant