Using NCCN1CCOCC1, O=C(O)CC(=O)N(c1ccccc1)c1ccccc1 to produce O=C(CC(=O)N(c1ccccc1)c1ccccc1)NCCN1CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.