Perchlorofulvalene

octachlorofulvalene

Octachloropentafulvalene

2,2',3,3',4,4',5,5'-Octachloro-Δ1,1'-bi[2,4-cyclopentadiene]

2,2',3,3',4,4',5,5'-Octachloro-Δ1,1'-bi[cyclopenta-2,4-diene]

1,2,3,4-Tetrachloro-5-(2,3,4,5-tetrachloro-2,4-cyclopentadien-1-ylidene)-1,3-cyclopentadiene