Using O=C(O)C1CN(C(=O)OCc2ccccc2)CCN1C(=O)OCc1ccccc1, O=C([O-])[O-] to produce COC(=O)C1CN(C(=O)OCc2ccccc2)CCN1C(=O)OCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.