Using CCCN(CC(C)C)c1ccc(C(=O)OCC)cc1NS(C)(=O)=O to produce CCCN(CC(C)C)c1ccc(C(=O)O)cc1NS(C)(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.