Using CN(CC1CC(=O)c2ccc(S(=O)(=O)c3ccccc3)cc2O1)C(=O)OC(C)(C)C to produce CN(CC1CC(O)c2ccc(S(=O)(=O)c3ccccc3)cc2O1)C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.