Using O=C(Cl)OCc1ccccc1, CCOC(=O)C(C)C1(NS(=O)C(C)(C)C)COC1 to produce CCOC(=O)C(C)C1(NC(=O)OCc2ccccc2)COC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.