Using CCC(O)c1ccc(Cl)c2nc3n(c12)CCCN3c1ccc(Cl)cc1Cl, CC(C)(C(=O)O)S(C)(=O)=O to produce CCC(OC(=O)C(C)(C)S(C)(=O)=O)c1ccc(Cl)c2nc3n(c12)CCCN3c1ccc(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.