Using Nc1nc(-c2cc(Cl)ccc2Cl)nc(N2CCSCC2)n1, O=S([O-])[O-] to produce Nc1nc(-c2cc(Cl)ccc2Cl)nc(N2CCS(=O)CC2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.