Using O=C1c2ccccc2-c2n[nH]c3cccc1c23, [N-]=[N+]=[N-] to produce O=C1Nc2ccccc2-c2n[nH]c3cccc1c23, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.