Using CC(=O)CCC(=O)Nc1ccc(S(=O)(=O)c2ccc(NC(=O)CCC(C)=O)cc2)cc1 to produce CC(O)CCC(=O)Nc1ccc(S(=O)(=O)c2ccc(NC(=O)CCC(C)O)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.