Using Cn1c(=O)c2c[nH]nc2n(CC2CC2)c1=O, O=C1CCC(=O)N1Br to produce Cn1c(=O)c2c(Br)[nH]nc2n(CC2CC2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.