Search
Now showing items 11-20 of 28
Three isoflav-3-enes and a 2-arylbenzofuran from the root bark of Erythrina burttii
(University of Nairobi, 2002-02)
From the root bark of Erythrina burttii three isoflav-3-enes, 7,4′-dihydroxy-2′-methoxy-6-(1″,1″-dimethylallyl)isoflav-3-ene (trivial name, burttinol-A), 4′-hydroxy-2′-methoxy-2″,2″-dimethylpyrano[5″,6″:8,7]isoflav-3-ene ...
Effect of rotenoids from the seeds of Millettia dura on larvae of Aedes aegypti
(University of Nairobi, 2003-10)
A crude chloroform extract of seeds of Millettia dura Dunn (Leguminosae) showed high activity (LC50 = 3.5 µg ml−1 at 24 h) against second-instar larvae of the mosquito, Aedes aegypti L (Diptera: Culicidae). The rotenoids, ...
Antimicrobial flavonoids from the stem bark of Erythrina burttii
(University of Nairobi, 2005-07)
The chloroform extract of the stem bark of Erythrina burttii showed antifungal and antibacterial activities using the disk diffusion method. Flavonoids were identified as the active principles. Activities were observed ...
The Mystery of Trichothecene Antibiotics in Baccharis Species
(1988-08)
The Brazilian higher plant Baccharis coridifolia has been shown to synthesize de novo a series of highly toxic macrocyclic trichothecene antibiotics heretofore found to be produced only by fungi. These compounds are produced ...
12,13-Deoxytrichoverrins from Myrothecium verrucaria
(1989-05)
The structures of two new diastereoisomeric 12,13-deoxytrichothecenes have been established by a combination of nmr and mass spectroscopy.
Flavonoids and isoflavonoids of Erythrina burttii
(2009)
From the stem bark and root bark of Erythrina burttii twenty-three flavonoids and isoflavonoids, including some
eight new compounds, have been isolated and characterised. The stem bark of this plant mainly produces
isoflavanones ...
7a-O-methyldeguelol, a modified rotenoid with an open ring-C, from the roots of Derris trifoliata
(2005-03)
From the acetone extract of the roots of Derris trifoliata an isoflavonoid derivative, named 7a-O-methyldeguelol, a modified rotenoid with an open ring-C, representing a new sub-class of isoflavonoids (the sub-class is ...
Two isoflavanones from the stem bark of Erythrina sacleuxii
(University of Nairobi, 2000-11)
From the stem bark of Erythrina sacleuxii two new isoflavanones, (R)-5,7-dihydroxy-2′,4′,5′-trimethoxyisoflavanone (trivial name, (R)-2,3-dihydro-7-demethylrobustigenin) and (R)-5-hydroxy-2′,4′,5′-trimethoxy-2″,2″-dimeth ...
Flavones and phenylpropenoids in the surface exudate of Psiadia punctulata
(University of Nairobi, 2001-06)
Three flavones, 5,7-dihydroxy-2′,3′,4′,5′-tetramethoxyflavone, 5,4′-dihydroxy-7,2′,3′,5′-tetramethoxyflavone, and 5,7,4′-trihydroxy-2′,3′,5′ -trimethoxyflavone were isolated from the leaf exudate of Psiadia punctulata, ...