Using O=C([O-])[O-], OC(CS)(Cn1cncn1)c1ccc(Cl)cc1Cl to produce CSCC(O)(Cn1cncn1)c1ccc(Cl)cc1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.