Using CCOC(=O)c1ccc(CCN2CCNCC2)cc1, O=C(Cl)Cc1ccc(Cl)cc1 to produce CCOC(=O)c1ccc(CCN2CCN(C(=O)Cc3ccc(Cl)cc3)CC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.