Using O=C(CBr)OCc1ccccc1, O=c1cnc2cc(Cl)c(Cl)cc2[nH]1 to produce O=C(Cn1c(=O)cnc2cc(Cl)c(Cl)cc21)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.