Using Cc1c[nH]c(=O)c2ccccc12, O=S(=O)([O-])OOS(=O)(=O)[O-] to produce O=Cc1c[nH]c(=O)c2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.