Using NCCN, CCOC(=N)Cn1c(Cl)c(S(C)(=O)=O)c2cc(Cl)ccc21 to produce CS(=O)(=O)c1c(Cl)n(CC2=NCCN2)c2ccc(Cl)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.