Using CCc1c(OCOC)cc(OCOC)c(-c2ccccc2)c1CCc1ocnc1CO to produce CCc1c(O)cc(O)c(-c2ccccc2)c1CCc1ocnc1CO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.