Fucols and Phlorethols from the Brown Alga Scytothamnus australis Hook. et Harv. (Chnoosporaceae)
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K.-W. Glombitza
Abstract
Eight fucols and two phlorethols were isolated by HPLC from the ethanolic extract of the brown alga Scytothamnus australis,. Because of their instability the substances were peracetylated before isolation. The phlorotannins trifucolnonaacetate, tetrafucol-A-dodecaacetate, tetrafucol-B-dodecaacetate, cis-pentafucol-A-pentadecaacetate, diphlorethol-A-pentaacetate and triphlorethol-A-heptaacetate have been characterized previously. In addition to these substances we found hydroxytetrafucol-B-tridecaacetate, pentafucol-B-pentadecaacetate, cis, trans-pentafucol-A-pentadecaacetate and hexafucol-B-octadecaacetate all of which are described for the first time. The elucidation of their structure was achieved by 1H NMR, 13C NMR, 1H 1H ROESY NMR and mass spectral data.
Copyright © 2003 by Walter de Gruyter GmbH & Co. KG
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- Meetings
Artikel in diesem Heft
- Checklist of Mediterranean Free-living Dinoflagellates
- Taxonomic Notes on Marine Algae from Malaysia. X. Four Species of Dasya (Rhodophyceae), with the Descriptions of Dasya longifila sp. nov. and D. malaccensis sp. nov.
- The Density and Survival of Fucus vesiculosus L. (Fucales, Phaeophyta) on Different Bedrock Types on a Baltic Sea Moraine Coast
- Seasonal and Spatial Patterns of "Green Tides" (Ulvoid Algal Blooms) and Related Water Quality Parameters in the Coastal Waters of Washington State, USA
- Effect of Irradiance and Temperature on Photosynthesis and Growth of Two Antarctic Benthic Diatoms, Gyrosigma subsalinum and Odontella litigiosa
- Marine Ascomycetes from Algae and Animal Hosts
- Variation of Native Agar Gel Strength in Light Deprived Gracilaria chilensis Bird, McLachlan et Oliveira
- Fucols and Phlorethols from the Brown Alga Scytothamnus australis Hook. et Harv. (Chnoosporaceae)
- Meetings
