PHYTOCHEMICAL STUDIES ON LAURENCIA OBTUSA (HUDSON) LAMOURUX
نویسندگان
چکیده
منابع مشابه
Observations on Enhancement & Inhibition by Light of Triphosphopyridine Nucleotide Photoreduction in Preparations of Laurencia obtusa (Hudson) Lam.
The alga, Laturencia obtutsa (Hudson) Lam., was collected between 7 and 8 AM from an off-shore reef (Cayo Enrique) at La Parguera, Puerto Rico. All plants came from one location on the reef at ca. one foot depth. They were stored in open-sea water under daylight, and used within 6 hours of harvest. Terminal fronds of similar coloration from the same clump w-ere taken for each experiment. Severa...
متن کاملNew Metabolites Isolated from a Laurencia obtusa Population Collected in Corsica.
The chemical investigation of an ethyl acetate extract (EtOAc) obtained from Laurencia obtusa, collected in Corsica, allowed for the identification of three new compounds (1, 2, and 4) and six known compounds. Compounds 1 to 4 were isolated and fully characterized by a detailed spectroscopic analysis. Compounds 1 and 2 are two C15-acetogenins sharing the same ring system: a tetrahydropyran link...
متن کاملChemical Composition of Laurencia obtusa Extract and Isolation of a New C15-Acetogenin.
A new C15-acetogenin, sagonenyne (20), exhibiting an unusual single tetrahydropyran ring was isolated from an ethyl acetate extract of Laurencia obtusa collected on the Corsican coastline. Its structure was established by detailed NMR spectroscopic analysis, mass spectrometry, and comparison with literature data. Twenty-three known compounds were identified in the same extract by means of colum...
متن کاملEcological roles of natural products of the Brazilian red seaweed Laurencia obtusa.
Laboratory and field experiments were performed to assess the ecological roles of natural products produced by the Brazilian red seaweed Laurencia obtusa. Laboratory assays revealed that the natural concentration of the crude organic extract of L. obtusa significantly inhibited feeding by two herbivores: the crab Pachygrapsus transversus and the sea urchin Lytechinus variegatus. It was verified...
متن کاملIsolaurenidificin and Bromlaurenidificin, Two New C15-Acetogenins from the Red Alga Laurencia obtusa.
Chromatographic fractionation of the CH₂Cl₂/MeOH extract of the Red Sea red alga Laurencia obtusa gave two new hexahydrofuro[3,2-b]furan-based C15-acetogenins, namely, isolaurenidificin (1) and bromlaurenidificin (2). The chemical structures were elucidated based on extensive analyses of their spectral data. Compounds 1 and 2 showed no toxicity (LC50 > 12 mM) using Artemia salina as test organi...
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ژورنال
عنوان ژورنال: International Journal of Biomedical and Advance Research
سال: 2012
ISSN: 2229-3809
DOI: 10.7439/ijbar.v3i4.417