Using Nc1c(Br)ccc[n+]1[O-], C=C(C(=O)O)C(C)c1ccc(C(=O)OC)cc1 to produce C=C(C(=O)Nc1c(Br)ccc[n+]1[O-])C(C)c1ccc(C(=O)OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.