Using CCOC(=O)c1cc(OCCc2ccc(Cl)cc2Cl)c2c(c1)OCO2 to produce O=C(O)c1cc(OCCc2ccc(Cl)cc2Cl)c2c(c1)OCO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.