69796-48-1 Bicyclo[2.2.1]hept-5-ene-2-acetic acid, 2-carboxy-1,4,5,6,7,7-hexachloro-, cyclic anhydride NSC38320 Spiro[bicyclo[2.2.1]hept-5-ene-2,3'(2'H)-furan]-2',5'(4'H)-dione, 1,4,5,6,7,7-hexachloro-