Using CCO, C[C@H](C(=O)OC(C)(C)C)N1CC[C@@H](NS(=O)(=O)c2ccc3cc(Cl)ccc3c2)C1=O to produce CCC(C(=O)OC(C)(C)C)N1CCC(NS(=O)(=O)c2ccc3cc(Cl)ccc3c2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.