title: A new phlorotannin from the brown alga Ecklonia stolonifera.
abstract: A new phlorotannin, named eckstolonol (1), was isolated from the EtOAc soluble fraction of the methanolic extract of the brown alga, Ecklonia stolonifera OKAMURA, along with three known phlorotannins, eckol (2), phlorofucofuroeckol A (3), and dieckol (4). The structure of eckstolonol was identified as 5,8,13,14-tetraoxa-pentaphene-1,3,6,9,11-pentaol on the basis of spectroscopic evidence. The new compound was found to be a radical scavenger on the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical.
authors.affiliation: Faculty of Food Science and Biotechnology, Pukyong National University, Busan, Korea.
authors.forename: Hye Sook
authors.initials: HS
authors.lastname: Kang
authors.forename: Hae Young
authors.initials: HY
authors.lastname: Chung
authors.forename: Jee Hyung
authors.initials: JH
authors.lastname: Jung
authors.forename: Byeng Wha
authors.initials: BW
authors.lastname: Son
authors.forename: Jae Sue
authors.initials: JS
authors.lastname: Choi
mesh_terms: D000459:Phaeophyceae; D013634:Tannins / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D013634:Tannins