Using O=S(=O)(OCC(F)(F)F)C(F)(F)F, CC(=O)N1CC2(CCNCC2)c2ccccc21 to produce FC(F)(F)CN1CCC2(CC1)CNc1ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.