Using O=C1CCC(=O)N1Br, Cc1ccc(-c2nc3ccc(Br)cc3o2)cc1 to produce BrCc1ccc(-c2nc3ccc(Br)cc3o2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.