The molecule is a phlorotanin that is 1,1'-bioxanthrene substituted by 3,5-dihydroxyphenoxy groups at position 6 and 6' and hydroxy groups at positions 2, 2', 4, 4', 7, 7', 9 and 9' respectively. It is isolated from an edible marine brown alga Ecklonia cava and exhibits antioxidant activity. It has a role as a metabolite, a radical scavenger and an anti-HIV-1 agent. It is a phlorotannin, an aromatic ether and an oxacycle. It derives from a phloroglucinol.
4-(3,5-dihydroxyphenoxy)-9-[6-(3,5-dihydroxyphenoxy)-2,4,7,9-tetrahydroxydibenzo-p-dioxin-1-yl]dibenzo-p-dioxin-1,3,6,8-tetrol