Using O=N[O-], CNC1=Nc2ccccc2N(c2ccccc2)C(=O)C1 to produce O=NCNC1=Nc2ccccc2N(c2ccccc2)C(=O)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.