Using O=C(Cl)c1ccc(Cl)cc1, CCOC(=O)c1ccc(N2CCNCC2)cc1 to produce CCOC(=O)c1ccc(N2CCN(C(=O)c3ccc(Cl)cc3)CC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.