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Open AccessFeature PaperCommunication
Molecules 2018, 23(5), 1214;

Antioxidants from the Brown Alga Dictyopteris undulata

Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan
Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
Japan Food Research Laboratories, Ibaraki, Osaka 567-0085, Japan
National Institute of Technology, Asahikawa College, Asahikawa 071-8142, Japan
Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan
Author to whom correspondence should be addressed.
Academic Editors: Isabel C. F. R. Ferreira and Nancy D. Turner
Received: 31 March 2018 / Revised: 15 May 2018 / Accepted: 16 May 2018 / Published: 18 May 2018
(This article belongs to the Collection Bioactive Compounds)
Full-Text   |   PDF [916 KB, uploaded 18 May 2018]   |  


An investigation of anti-oxidative compounds from the brown alga Dictyopteris undulata has led to the isolation and identification of isozonarol, isozonarone, chromazonarol, zonaroic acid and isozonaroic acid. Their structures were identified by comparison of MS and NMR spectra. Full NMR assignment and absolute configuration of isozonaroic acid are described. Isozonarol showed the most potent 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity among the compounds isolated. View Full-Text
Keywords: Dictyopteris undulata; antioxidant; sesquiterpene hydroquinone Dictyopteris undulata; antioxidant; sesquiterpene hydroquinone

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Kumagai, M.; Nishikawa, K.; Matsuura, H.; Umezawa, T.; Matsuda, F.; Okino, T. Antioxidants from the Brown Alga Dictyopteris undulata. Molecules 2018, 23, 1214.

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