Using O=C(c1ccc(Cl)cc1)C(Cc1ccc(Cl)cc1Cl)n1cncn1 to produce OC(c1ccc(Cl)cc1)C(Cc1ccc(Cl)cc1Cl)n1cncn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.