Antibiotics from Algae, XXXVI.1,2 Phlorotannins from the Brown Alga Cystoseira granulata

K.-W. Glombitza; S. Wegner-Hambloch; H.-R. Schulten

doi:10.1055/s-2007-969423

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Planta Med 1985; 51(2): 116-120
DOI: 10.1055/s-2007-969423

Research Articles

Antibiotics from Algae, XXXVI.^1,2 Phlorotannins from the Brown Alga Cystoseira granulata

K.-W. Glombitza³ , S. Wegner-Hambloch³ , H.-R. Schulten⁴

³Institut für Pharmazeutische Biologie der Universität Bonn, Nußallee 6, D-5300 Bonn 1, Federal Republic of Germany
⁴Fachhochschule Fresenius, Department of Trace Analysis, Wiesbaden, Federal Republic of Germany

1 For part XXXV see ref. (1)2 Field Desorption Mass Spectrometry of Natural Products XIII, for part XII see ref. (2)

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1984

1984

Publication Date:
26 February 2007 (online)

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Abstract

Phloroglucinol triacetate and eight oligomers of phloroglucinol (phlorotannins) were isolated from a phenolic fraction of Cystoseira granulata extracted by ethyl acetate. The structures were elucidated by spectroscopic methods using the acetyl derivates. In addition to the three known oligomers, diphlorethol acetate, bifuhalol acetate, triphlorethol-B-heptaacetate, five new substances were isolated: fucotriphlorethol-B-dodecaacetate, fucotetraphlorethol-A-tetradecaacetate, fucopentaphlorethol-A-hexadecaacetate, fucoheptaphlorethol-A-eicosaacetate and an unidentified 8-membered-ring compound.