Using O=C(Nc1ccccn1)c1ccc([N+](=O)[O-])c([N+](=O)[O-])c1 to produce Nc1ccc(C(=O)Nc2ccccn2)cc1N, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.