Using Nc1ncc(Cl)s1, COC(=O)c1ccc(S(=O)(=O)Cl)cn1 to produce O=C(O)c1ccc(S(=O)(=O)Nc2ncc(Cl)s2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.