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 that fulfills the requirement: It belongs to the vasopressin antagonist class of molecules.
user
CC(=O)OC(C)OC(=O)N(C)C(C(=O)O)C1CCCN(C(=O)c2ccc(NC(=O)c3ccccc3C)cc2C)c2ccc(Cl)cc21
assistant