Using NCC=CCN1CCN(c2cccc(Cl)c2Cl)CC1, O=C(O)c1ccc(O)cc1 to produce O=C(NCC=CCN1CCN(c2cccc(Cl)c2Cl)CC1)c1ccc(O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.