Using O=S(=O)(O)O, Nc1ccc2c(c1)CCN(C(=O)C(F)(F)F)CC2 to produce O=C(N1CCc2ccc(O)cc2CC1)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.