Using COc1cc(OC)nc(Oc2c(Cl)cc(Cl)cc2C(OC)OC)n1 to produce COc1cc(OC)nc(Oc2c(Cl)cc(Cl)cc2C=O)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.