Acetylcholinesterase inhibitory activity of phlorotannins isolated from the brown alga, Ecklonia maxima (Osbeck) Papenfuss

► Complete spectral data of dibenzo [1,4] dioxine-2,4,7,9-tetraol are reported. ► Dibenzo [1,4] dioxine-2,4,7,9-tetraol and eckol exhibited prominent AChE activity. ► Isolated phlorotannins could potentially be used to treat Alzheimer's disease.