Using Cn1ccc2c(Nc3ccc(F)c(Cl)c3)ncnc21, O=C(CBr)c1ccc(Br)cc1 to produce CN1C(=O)Cc2c(Nc3ccc(F)c(Cl)c3)ncnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.