Using COc1ccc(C=O)c(O)c1-c1cc2ccccc2s1, O=C([O-])[O-] to produce COc1ccc(C=O)c(OC)c1-c1cc2ccccc2s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.