Using O=C([O-])[O-], O=c1c(-c2ccc(O)cc2)coc2cc(O)ccc12 to produce COc1ccc2c(=O)c(-c3ccc(O)cc3)coc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.