Using O=C(n1ccnc1)n1ccnc1, NNC(=O)c1cccc([N+](=O)[O-])c1 to produce O=c1[nH]nc(-c2cccc([N+](=O)[O-])c2)o1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.