1,2,4,7,9-Pentachlorodibenzo-p-dioxin;1,2,4,7,9-PCDD;1,2,4,7,9-Pentachlorodibenzo[1,4]dioxin;1,2,4,7,9-Pentachlorodibenzo[b,e][1,4]dioxin;1,3,4,6,8-Pentachlorodibenzo-p-dioxin
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