Using CCOC(=O)C(=O)Nc1cc(Cl)c(Oc2ccc(O)c(S(=O)(=O)N3CCCC3)c2)c(Cl)c1 to produce O=C(O)C(=O)Nc1cc(Cl)c(Oc2ccc(O)c(S(=O)(=O)N3CCCC3)c2)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.