1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12-tetracosafluoro-1,2,3,4,5,6,7,8,9,10,11,12-dodecahydrotetracyclopenta[a,c,e,g][8]annulene