1,1a,2,2,3,3a,4,5,5,5a,5b,6-dodecachlorooctahydro-1,3,4-metheno-1h-cyclobuta(cd)pentalene; Dodecachlorooctahydro-1,3,4-methano-2h-cyclobuta(cd)-pentalene; Dodecachloropentacyclo(3.3.2.o**2,6.o**3,9.0**5,10)decane; Ent 25,719; Hexachlorocyclopentadiene dimer; 1,2,3,4,5,5-hexachloro-1,3-cyclopentadiene dimer; Perchlorodihomocubane; Perchloropentacyclodecane; Perchloropentacyclo(5.2.1.o**2,6.o**3,9.o**5,8)decane; Cg-1283; Dechlorane; Dechlorane 515; Dechlorane 4070; Ferriamicide; Hrs 1276; Mirex.