Using O=C1c2ccc([N+](=O)[O-])cc2C(=O)N1c1cccc([N+](=O)[O-])c1 to produce Nc1cccc(N2C(=O)c3ccc(N)cc3C2=O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.