Using O=C1CCC(=O)N1Cl, CC(C)(C)c1ccc(S(=O)(=O)Nc2ccc(Cl)cc2-n2cccn2)cc1 to produce CC(C)(C)c1ccc(S(=O)(=O)Nc2ccc(Cl)c(Cl)c2-n2cccn2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.