Using NC(=O)C1CCNCC1, O=C(O)CNC(=O)OCc1ccccc1 to produce NC(=O)C1CCN(C(=O)CNC(=O)OCc2ccccc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.