Using CCO, COc1cc(-c2cnn3c(O)ncnc23)ccc1S(=O)c1ccccc1 to produce COc1cc(-c2cnn3c([O-])ncnc23)ccc1S(=O)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.