Now showing items 1-10 of 20
Friedelane triterpoids from rawsonia lucida
Rawsonia lucida (Flacourtiaceae) is an evergreen tree or shrub that is mainly distributed in tropical and southern Africa. Recent survey of plants traditionally used for the treatment of malaria have shown that the ...
Bioactivity of 'Flemingin A' and other Natural Products from the leaves of Flemingia grahamiana
Flemingia graharriiana (Wight & Arn.) is an erect herb or sub-shrub up to 1.8 m tall with deep (sometimes tuberous) roots and 3-foliate alternate leaves. It is distributed in Tropical Africa and occurs in open and wooded ...
Op-37 Flavonoids from erythrina burttii and erythrina sacleuxii
The root and stem bark of Erythrina species are widely used in traditional medicine for the treatment of microbial infections: In our interest on the phytochemistry of Erythrina species of Kenya, we have isolated several ...
Knipholone cyclooxanthrone and an anthraquinone dimer with antiplasmodial activities from the roots of Kniphofia foliosa
A new phenylanthrone, named knipholone cyclooxanthrone and a dimeric anthraquinone, 10-methoxy-10,7′-(chrysophanol anthrone)-chrysophanol were isolated from the roots of Kniphofia foliosa together with the rare naphthalene ...
Simultaneous determination of iron(III) and vanadium(V) with N-phenylcinnamohydroxamic acid and thiocyanate by extraction-spectrophotometry
(University of Nairobi, 1985)
N-Phenylcinnarnohydroxamic acid (PCHA) reacts with iron(III) and vanadium(V) in the presence of thiocyanate to form water-insoluble orange and green complexes, respectively. The iron(III)-PCHA and vanadium(V)-PCHA-thiocyanate ...
Alkaloids of Teclea nobilis
(University of Nairobi, 1988)
A new furoquinoline alkaloid to which we have assigned the trivial name nobiline, and seven other quinonline alkaloids were isolated and identified from the leaves and fruits of Teclea nobilis, an African medicinal plant.
Anthraquinones of the roots of Pentas micrantha
(University of Nairobi, 2012-12)
Pentas micrantha is used in the East African indigenous medicine to treat malaria. In the first investigation of this plant, the crude methanol root extract showed moderate antiplasmodial activity against the W2- (3.37 ...
Antiparasitic and anticancer carvotacetone derivatives of Sphaeranthus bullatus.
(University of Nairobi, 2012-09)
The CH2Cl2-MeOH (1:1) extract of the aerial parts of Sphaeranthus bullatus, an annual herb native to tropical East Africa, showed activity against chloroquine sensitive D6 (IC50 9.7 microg/mL) and chloroquine resistant W2 ...
Four isoflavones from seed pods of Millettia dura
(University of Nairobi, 1996-02)
Seed pods of Millettia dura yielded four novel isoflavones, which have been characterized as 3-(3,4-dimethoxyphenyl)-6-methoxy-8,8-dimethyl-4H,8H-benzo[1,2-b: 3,4-b′]dipyran-4-one (trivial name, durallone), 6-demethyldurallone, ...