1,4-Methanonaphthalene-5,8-dione, 2,3,6,7-tetrachloro-4a,8a-epoxy-1,2,3,4,4a,8a-hexahydro- 2,3,6,7-Tetrachloro-4a,8a-epoxy-1,2,3,4,4a,8a-hexahydro-1,4-methanonaphthalene-5,8-dione 4794-20-1 4a,8a-Epoxy-1,4-methanonaphthalene-5,8-dione, 2,3,6,7-tetrachloro-1,2,3,4-tetrahydro- SD 7231 Shell SD 7231