Using COC(=O)c1ccccc1C(=O)Nc1snc(C)c1[N+](=O)[O-] to produce COC(=O)c1ccccc1C(=O)Nc1snc(C)c1N, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.