Using Cc1c(CCO)n(S(=O)(=O)c2ccccc2)c2ccccc12 to produce Cc1c(CC=O)n(S(=O)(=O)c2ccccc2)c2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.