Using BrCC1CC1, O=C(Nc1ccc(-c2ccccc2Cl)[nH]c1=O)OCc1ccccc1 to produce O=C(Nc1ccc(-c2ccccc2Cl)n(CC2CC2)c1=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.