1 2 3 6 7 8 hexachlorodibenzo p dioxin July 8, 2019 16 32 64 128 1 2 3 7 8 9-hexachlorodibenzofuran 1 2 3 7 8-pentachlorodibenzo-p-dioxin 1-(2 3-dihydrobenzo b 1 4 dioxin-6-yl)ethan-1-one 2 3 7 8-tetrachlorodibenzo dioxin
