Using CCOC(=O)CBr, O=c1[nH]c2ccccc2c(=O)n1Cc1ccc(Cl)c(Cl)c1 to produce CCOC(=O)Cn1c(=O)n(Cc2ccc(Cl)c(Cl)c2)c(=O)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.