1,2,3,4,7,7-hexachlorobicyclo[2.2.1]-2,5-heptadiene 1,2,3,4,7,7-hexachlorobicyclo[2.2.1]hepta-2,5-diene InChI=1/C7H2Cl6/c8-3-4(9)6(11)2-1-5(3,10)7(6,12)13/h1-2 bicyclo[2.2.1]hepta-2,5-diene, 1,2,3,4,7,7-hexachloro-