Using Cc1nc(O)c2c(n1)CCNCC2, Cc1nc(Br)c([N+](=O)[O-])c(=O)[nH]1 to produce Cc1nc(O)c2c(n1)CCN(c1nc(C)nc(O)c1[N+](=O)[O-])CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.