Using O=S(=O)(c1ccc(N(Cc2ccccc2)Cc2ccccc2)cc1)C(F)(F)F to produce Nc1ccc(S(=O)(=O)C(F)(F)F)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.