Using O=C(Cc1ccccc1CNC(=O)OCc1ccccc1)NC1CN(S(=O)(=O)[O-])C1=O to produce NCc1ccccc1CC(=O)NC1CN(S(=O)(=O)[O-])C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.