Using O=S(=O)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, CCN to produce CCNS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.