Using O=[N+]([O-])c1ccc([N+](=O)[O-])c(NCCNc2cc([N+](=O)[O-])ccc2[N+](=O)[O-])c1 to produce Nc1ccc(N)c(NCCNc2cc(N)ccc2N)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.