2 2 3 4 7 8 July 8, 2019 16 32 64 128 2 3 4 7 8 pentachlorodibenzofuran 2 3 4 7 8 pecdf 2 3 4 7 8 9 2 3 4 7 8 6 1 2 3 4 7 8 1 2 3 4 7 8 sequence X 2 3 4 7 8 1 2 3 4 7 8 hxcdf 1 2 3 4 7 8-hexachloro dibenzo-p-dioxin 5 2 3 4 7 8 1 2 3 4 7 8 as a fraction 2 2 15 x 8 4 7 x 3 15 25 2 3 4 7 8 as a fraction 2 3 4 7 8 pcdf 2 3 4 7 8-pentacles
