Antioxidative Constituents from the Leaves of Hypericum s typhelioides

Two new compounds have been isolated from the leaves of Hypericum styphelioides. Their structures have been established on the basis of mass spectrometry and 2D NMR techniques as 1,3,5-trihydroxy-2-(2‘,2‘-dimethyl-4‘-isopropenyl)cyclopentanylxanthone (1) and 3,5-dihydroxybenzophenon-4-β-d-glucoside...

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Bibliographic Details
Published in:Journal of natural products (Washington, D.C.) D.C.), 2004-05, Vol.67 (5), p.869-871
Main Authors: Gamiotea-Turro, Daylin, Cuesta-Rubio, Osmany, Prieto-González, Sylvia, De Simone, Francesco, Passi, Siro, Rastrelli, Luca
Format: Article
Language:English
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Summary:Two new compounds have been isolated from the leaves of Hypericum styphelioides. Their structures have been established on the basis of mass spectrometry and 2D NMR techniques as 1,3,5-trihydroxy-2-(2‘,2‘-dimethyl-4‘-isopropenyl)cyclopentanylxanthone (1) and 3,5-dihydroxybenzophenon-4-β-d-glucoside (2). Known compounds 5-O-demethylpaxanthonin (3) and 3-geranyl-1-(3-methylbutanoyl)phloroglucinol (4) were also isolated and characterized. Compounds 1−4 were evaluated for their antioxidative properties in Trolox equivalent antioxidant activity (TEAC) and chemiluminescence (CL) assays.
ISSN:0163-3864
1520-6025
DOI:10.1021/np030364f