Using NS(=O)(=O)c1ccc(OCCO)cc1, COC(=O)C(=O)c1ccc(O)cc1 to produce COC(=O)C(=O)c1ccc(OCCOc2ccc(S(N)(=O)=O)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.