Using NCCN, CCOC(=N)c1ccc(-c2ccc([N+](=O)[O-])cc2)o1 to produce O=[N+]([O-])c1ccc(-c2ccc(C3=NCCN3)o2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.