Using CC(C)n1c(N2CCNCC2)nc2c([N+](=O)[O-])c(Br)c(Br)cc21, CC(C)(C)OC(=O)N1CCNCC1 to produce CC(C)(C)OC(=O)N1CCN(c2nc3c([N+](=O)[O-])c(Br)c(Br)cc3[nH]2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.