Using CN1CCN(CCN(c2ccc(C(=O)OCC(=O)OCc3ccccc3)cc2OCC2CC2)S(C)(=O)=O)CC1 to produce CN1CCN(CCN(c2ccc(C(=O)OCC(=O)O)cc2OCC2CC2)S(C)(=O)=O)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.