Using O=P(Br)(Br)Br, CC(C)Oc1ccc(-c2nc(-c3cccc4c(=O)[nH]ccc34)no2)cc1Cl to produce CC(C)Oc1ccc(-c2nc(-c3cccc4c(Br)nccc34)no2)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.