Using OCCCNc1nc2cc(Br)ccc2n2ccnc12, OB(O)c1ccccc1C(F)(F)F to produce OCCCNc1nc2cc(-c3ccccc3C(F)(F)F)ccc2n2ccnc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.