(a) Ecklonia cava extract (1 mg)
(b) Ethyl acetate fraction (1 mg)
(c) Eckol
(d) Dieckol
Figure 4: HPLC of Ecklonia cava extract and the chemical structures of eckol and dieckol. Typical HPLC patterns of E. cava extract (a) and its ethyl acetate fraction (b). The peaks of eckol and dieckol were identified by the comparison of the retention times with those of standard compounds. The chemical structures of eckol and dieckol are shown in (c) and (d).