Using COC(=O)c1ccc(Cl)c(O)c1, OCCc1ccc(Cl)cc1Cl to produce COC(=O)c1ccc(Cl)c(OCCc2ccc(Cl)cc2Cl)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.