polychlorinated dibenzodioxine 1,2,3,4,6,7,8-Heptachlorodibenzodioxin chebi_ontology InChI=1S/C12HCl7O2/c13-2-1-3-10(7(17)4(2)14)21-12-9(19)6(16)5(15)8(18)11(12)20-3/h1H 425.30600 1,2,3,4,6,7,8-HpCDD 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin CHEBI:81505 C12HCl7O2 Clc1cc2Oc3c(Cl)c(Cl)c(Cl)c(Cl)c3Oc2c(Cl)c1Cl WCLNVRQZUKYVAI-UHFFFAOYSA-N PCDD 73 421.77962 0 CAS:35822-46-9 KEGG:C18103