Using O=C1CN(C(c2ccc(Cl)cc2)c2ccc(Cl)cc2)CCN1, COC(=O)CBr to produce COC(=O)CN1CCN(C(c2ccc(Cl)cc2)c2ccc(Cl)cc2)CC1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.