3a,4,5,6,7,8,8-Heptachloro-3a,4,7,7a-tetrahydro-4,7-methanoindene 4,7-Methanoindene, 3a,4,5,6,7,8,8-heptachloro-3a,4,7,7a-tetrahydro- 6033-56-3