Using O=C(O)c1cc(-c2ccc(Cl)cc2)nc(Cl)n1, CCOCC to produce CCOC(=O)c1cc(-c2ccc(Cl)cc2)nc(Cl)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.