You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule based on this description: It belongs to the cgrpantagonists class of molecules.
user
O=C(OC(Cc1ccc2c(c1)OCCO2)C(=O)N1CCN(C2CCNCC2)CC1)N1CCC(N2CCc3ccccc3NC2=O)CC1
assistant