Using CCCC[Sn](Cl)(CCCC)CCCC, FC(F)(F)c1ccc(-c2ncc(Br)cn2)cc1 to produce CCCC[Sn](CCCC)(CCCC)c1cnc(-c2ccc(C(F)(F)F)cc2)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.