Abstract
Two new guignardones and one tricycloalternarene derivatives, named guignardone D, E (2–3) and tricycloalternarene F (4), and the known guignardone A (1) were isolated from Guignardia mangiferae, an endophytic fungus from the leaves of Viguiera arenaria (Asteraceae), after fermentation in Czapek medium. Structures were established on the basis of their spectroscopic data, including 1H NMR, 13C NMR, HMQC, HMBC and HRESI-MS.
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