You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a vasopressin antagonist.
user
CCCCC(NS(=O)(=O)c1ccc([N+](=O)[O-])cc1)Oc1ccc(C(=O)N2CCC(N3C(=O)CCc4ccccc43)CC2)cc1
assistant