Using BrCCOCCBr, Cc1ccc(S(=O)(=O)Nc2c(C(C)C)cc(N)cc2C(C)C)cc1 to produce CC(C)c1cc(N2CCOCC2)cc(C(C)C)c1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.