Using COC(=O)c1ccc2c(c1)S(=O)(=O)Cc1ccccc1C2O to produce COC(=O)c1ccc2c(c1)S(=O)(=O)Cc1ccccc1C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.