Using O=N[O-], CCOC(=O)c1cn(-c2ccc(N)cc2)[nH]c1=O to produce CCOC(=O)c1cn(-c2ccc(O)cc2)[nH]c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.