Using O=C(O)CNC(=O)C1=C(O)CCN(Cc2ccc(Oc3ccc(Cl)cc3)nc2)C1=O to produce O=C([O-])CNC(=O)C1=C(O)CCN(Cc2ccc(Oc3ccc(Cl)cc3)nc2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.