Using CCCCc1nc2nc(CO)c(Br)cc2[nH]1, O=C(CBr)c1ccccc1 to produce CCCCc1nc2cc(Br)c(CO)nc2n1CC(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.