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The Tropical Brown Alga Lobophora variegata: A Source of Antiprotozoal Compounds
Lobophora variegata, a brown alga collected from the coast of the Yucatan peninsula, Mexico, was studied for antiprotozoal activity against Giardia intestinalis, Entamoeba histolytica and TrichomonasExpand
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Preliminary results on the protective effect of (-)-edunol, a pterocarpan from Brongniartia podalyrioides (Leguminosae), against Bothrops atrox venom in mice.
(-)-Edunol a prenylated pterocarpan was isolated from the roots of two Mexican 'snakeweeds', Brongniartia podalyrioides and B. intermedia (Leguminosae). Edunol (3.1 mg/kg, i.p.) reduced the expectedExpand
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Antigiardial activity of triterpenoids from root bark of Hippocratea excelsa.
Two new triterpenoids, 21 beta-hydroxyolean-12-en-3-one (1) and a seco-dinor derivative of pristimerine named dzununcanone (2), were isolated from the root bark of Hippocratea excelsa. TheirExpand
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Stimulation of witchweed germination by sesquiterpene lactones: a structure-activity study.
Abstract Twenty-four natural and synthetic sesquiterpene lactones were tested as witchweed germination stimulants to determine the essential structural requirements for the stimulation of witchweedExpand
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Prenylflavanols from Tephrosia quercetorum
Abstract The roots of Tephrosia quercetorum afforded three new flavonoids named quercetols A, B and C. Their structures were established by spectroscopic methods, mainly 1 H NMR.
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Eudesmanolides, trichomatolides B–E, and A heliangolide from Calea trichomata
Abstract Calea trichomata gave in addition to four known 1β-hydroxy-8β-tigloyloxy-11(13)-eudesmen-6α, 12-olide derivatives a new heliangolide, 3-deoxy
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Antimycobacterial eudesmanolides from Inula helenium and Rudbeckia subtomentosa.
In a bioassay guided search for antimycobacterial compounds from higher plants, the root extracts of Elecampane (Inula helenium L.; Asteraceae) and Sweet Coneflower (Rudbeckia subtomentosa Pursh.;Expand
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Antimycobacterial evaluation of germacranolides.
The minimum inhibitory concentrations (MIC) against Mycobacterium tuberculosis and M. avium of parthenolide, costunolide, 1 (10)-epoxycostunolide and other germacranolide-type sesquiterpene lactonesExpand
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Sesquiterpenes and thiarubrines from Ambrosia trifida and its transformed roots
Abstract The roots of giant ragweed ( Ambrosia trifida ) afforded β-farnesene, β-bisabolene and squalene. In addition, thiarubrine B and its related thiop
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