Search
Now showing items 11-20 of 36
Chemotaxonomic significance of anthraquinones in the roots of asphodeloideae (asphodelaceae)
(1995)
The distribution of seven anthraquinones in the roots of some 46 species belonging to the genera Asphodelus, Asphodeline, Bulbine, Bulbinella and Kniphofia was studied by TLC and HPLC, 1,8-Dihydroxyanthraquinones based on ...
The chemotaxonomic significance of root anthraquinones and pre-anthraquinones in the genus Lomatophyllum (asphodelaceae)
(University of Nairobi, 1995-11)
The roots of seven species of Lomatophyllum were analysed by TLC and HPLC for the presence of nine different anthraquinones and pre-anthraquinones which are all known to be characteristic constituents of the subterranean ...
A comparative study of anthraquinones in rhizomes of Kniphofia species
(University of Nairobi, 1988-01-14)
The anthraquinone content of eight kniphofia species was compared using reversed phase HPLC method coupled with a photodiode array detector.
A pre-anthraquinone derivative from aloe graminicole
(2009)
Atrochrysone and torosachrysone play an important role in the biosynthesis of the common
polyketide-derived anthraquinones, such as emodin and physcion [1]. We report here for the
first time the occurrence in nature of ...
Three steroidal alkaloids from Buxus hildebrandtii
(University of Nairobi, 1990)
From the leaves of Buxus hildebrandtii three new steroidal alkaloids have been isolated and their structures determined by spectroscopic analysis. The following derived names have been suggested for these new alkaloids: ...
The antiplasmodial and radical scavenging activities of flavonoids of Erythrina burttii
(2012-08)
The acetone extract of the root bark of Erythrina burttii showed in vitro antiplasmodial activity against the chloroquine-sensitive (D6) and chloroquine-resistant (W2) strains of Plasmodium falciparum with IC50 values of ...
Four isoflavones from the stem bark of erythrina sacleuxii
(University of Nairobi, 1998-09-03)
From the stem bark of Erythrina sacleuxii four new isoflavones were isolated and characterized as 5,7-dihydroxy-2′,4′,5′-trimethoxyisoflavone (trivial name, 7-demethylrobustigenin), 5,7-dihydroxy-4′-methoxy3′-(3-methylbu ...
neo-Clerodane diterpenoids from the leaf exudate of Dodonaea angustifolia
(University o nairobi, 2010)
Phytochemical investigation of the leaf surface exudate of Dodonaea angustifolia L.f. yielded two new neo-clerodane diterpenes, neo-clerodan-3,13-dien-16,15:18,19-diolide (mkapwanin) and 15-methoxy-neo-clerodan-3,13-dien ...
Antiplasmodial Flavonoids from Erythrina sacleuxii
(University of Nairobi, 2006-02)
The acetone extracts of the root bark and stem bark of Erythrina sacleuxii showed antiplasmodial activities against the chloroquine-sensitive (D6) and chloroquine-resistant (W2) strains of Plasmodium falciparum. Chromatographic ...
Busseihydroquinones A-D From The Roots Of Pentas Bussei
(University of Nairobi, 2012-07)
Four new naphthohydroquinones, named busseihydroquinones A−D (1−4), along with a known homoprenylated dihydronaphthoquinone (5), were isolated from the CH2Cl2/MeOH (1:1) extract of the roots of Pentas bussei. Although the ...