Using COC(=O)Cc1ccc(Oc2ccc3c(c2[N+](=O)[O-])CC(=O)N3)c(OC)c1, O=P(Br)(Br)Br to produce COC(=O)Cc1ccc(Oc2ccc3[nH]c(Br)cc3c2[N+](=O)[O-])c(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.