1,2,3,4,5,6,7,8,8-NONACHLORO-3A,4,7,7A-TETRAHYD* 1,2,3,4,5,6,7,8,8-Nonachloro-3a,4,7,7a-tetrachloro-4,7-methano-1H-indene 21641-70-3 4,7-Methano-1H-indene, 1,2,3,4,5,6,7,8,8-nonachloro-3a,4,7,7a-tetrachloro-