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New Haloterpenes from the Marine Red Alga Laurencia papillosa: Structure Elucidation and Biological Activity.

ABSTRACT: Analysis of the air-dried marine red alga Laurencia papillosa, collected near Ras-Bakr at the Suez gulf (Red Sea) in Egypt delivered five new halogenated terpene derivatives: aplysiolic acid (1), 7-acetyl-aplysiol (2), aplysiol-7-one (3), 11,14-dihydroaplysia-5,11,14,15-tetrol (5a), and a new maneonene derivative 6, named 5-epi-maneolactone. The chemical structures of these metabolites were characterized employing spectroscopic methods, and the relative and absolute configurations were determined by comparison of experimental and ab initio-calculated NMR, NOE, ECD, and ORD data, and by X-ray diffraction of 2 and 6. The antimicrobial activities of the crude extract and compounds 1-3, 5a and 6 were studied.

SUBMITTER: Shaaban M

PROVIDER: S-EPMC7830550 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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New Haloterpenes from the Marine Red Alga Laurencia papillosa: Structure Elucidation and Biological Activity.

Shaaban Mohamed M Abou-El-Wafa Ghada S E GSE Golz Christopher C Laatsch Hartmut H

Marine drugs 20210114 1

Analysis of the air-dried marine red alga Laurencia papillosa, collected near Ras-Bakr at the Suez gulf (Red Sea) in Egypt delivered five new halogenated terpene derivatives: aplysiolic acid (1), 7-acetyl-aplysiol (2), aplysiol-7-one (3), 11,14-dihydroaplysia-5,11,14,15-tetrol (5a), and a new maneonene derivative 6, named 5-epi-maneolactone. The chemical structures of these metabolites were characterized employing spectroscopic methods, and the re ...[more]

PMID: 33466896

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