<unk>  is the common name for the group of compounds classified as polychlorinated dibenzodioxins (PCDDs). PCDDs, which are members of the family of halogenated organic compounds, have been shown to bioaccumulate in humans and wildlife due to their lipophilic properties, and are known teratogens, mutagens, and suspected human carcinogens.
Dioxin
Indole alkaloid
Nitrobenzene
Alcohol
Polychlorinated biphenyl
Benzene
Organophosphate
Allergen