1 ENH 1,7,8,9,10,10-hexachloro-4-methyl-4-aza-tricyclo[5.2.1.0(2,6)]dec-8-ene-3,5-dione 1.000 2 Q5E 1,7,8,9,10,10-hexachloro-4-carboxypentyl-4-aza-tricyclo[5.2.1.0(2,6)]dec-8-ene-3,5-dione 0.731