Using c1cc2c(cn1)NCCO2, O=C(CBr)c1cc(Br)c(O)c(Br)c1 to produce O=C(CN1CCOc2ccncc21)c1cc(Br)c(O)c(Br)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.