24143-69-9 29555-44-0 39765-80-5 4,7-Methano-1H-indene, 1,2,3,4,5,6,7,8,8-nonachlor-2,3,3a,4,7,7a-hexahydro-, (1-alpha,2-beta,3-alpha,3a-alpha,4-beta,7-beta,7a-alpha)- TRANS-NONACHLOR t-Nonachlor