Using O=C(O)c1cc(Br)cc(C(F)(F)F)c1, NCC1CCN(CCNS(=O)(=O)C(F)(F)F)CC1 to produce O=C(NCC1CCN(CCNS(=O)(=O)C(F)(F)F)CC1)c1cc(Br)cc(C(F)(F)F)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.