2 3 7 8-tetrachlordibenzodioxin July 8, 2019 16 32 64 128 2 3 7 8-tetrachlorodibenzo dioxin 2 4 5 trioxin 2 3 7 8-tetrachlorodibenzo-p-dioxin 2 3 7 8-tetrachlorodibenzodioxine