Using COc1ccc(-c2nc(S)ncc2-c2ccc(Cl)cc2)cc1, O=C([O-])[O-] to produce COc1ccc(-c2nc(SC)ncc2-c2ccc(Cl)cc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.