Synonyms: 1,5,6,8,9,10,11,11-Octachlor-4-oxatetracyclo[6.2.1.0~2,7~.0~3,5~]undec-9-en;1,5,6,8,9,10,11,11-Octachloro-4-oxatetracyclo[6.2.1.0~2,7~.0~3,5~]undec-9-ene;1,5,6,8,9,10,11,11-Octachloro-4-oxatétracyclo[6.2.1.0~2,7~.0~3,5~]undéc-9-ène;2,5-methano-2H-indeno[1,2-b]oxirene, 2,3,4,5,6,6a,7,7-octachloro-1a,1b,5,5a,6,6a-hexahydro-;27304-13-8