Using COC(=O)CS, O=Cc1ccc([N+](=O)[O-])cc1[N+](=O)[O-] to produce COC(=O)c1cc2ccc([N+](=O)[O-])cc2s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.