Using O=N[O-], NNC(=O)c1ncc2[nH]c3ccccc3c2n1 to produce [N-]=[N+]=NC(=O)c1ncc2[nH]c3ccccc3c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.