Using O=C(NCC1CCN(S(=O)(=O)C=Cc2ccccc2)CC1)OCc1ccccc1 to produce NCC1CCN(S(=O)(=O)CCc2ccccc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.