Search Results - "Yeboah, Samuel O"

A new homoisoflavonoid and the bioactivities of some selected homoisoflavonoids from the inter-bulb surfaces of Scilla nervosa subsp. rigidifolia by Famuyiwa, Samson O., Ntumy, Aku N., Andrae-Marobela, K., Yeboah, Samuel O.

“…Seven homoisoflavonoids and one stilbenoid, 3-(4′-methoxybenzyl)-6,7-dihydroxy-5-methoxychroman-4-one (1) which is new;…”
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Cytotoxic phytochemicals from the crude extract of Tetrapleura tetraptera fruits towards multi-factorial drug resistant cancer cells by Mbaveng, Armelle T., Chi, Godloves F., Bonsou, Idrios N., Ombito, Japheth O., Yeboah, Samuel O., Kuete, Victor, Efferth, Thomas

“…Tetrapleura tetraptera is an African medicinal spice used in traditional medicine to treat several ailments including cancer. The present study was designed to…”
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Recent applications of Cinchona alkaloids and their derivatives as catalysts in metal-free asymmetric synthesis by Yeboah, Elizabeth M.O., Yeboah, Samuel O., Singh, Girija S.

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Cytotoxicity of seputhecarpan D, thonningiol and 12 other phytochemicals from African flora towards human carcinoma cells by Kuete, Victor, Ngnintedo, Dominique, Fotso, Ghislain W, Karaosmanoğlu, Oğuzhan, Ngadjui, Bonaventure T, Keumedjio, Felix, Yeboah, Samuel O, Andrae-Marobela, Kerstin, Sivas, Hülya

“…Despite the remarkable progress in cancer therapy in recent years, this disease still remains a serious public health concern. The use of natural products has…”
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Three New Derivatives and Others Constituents from the Roots and Twigs of Trilepisium madagascariense DC by Ango, Yves P., Kapche, Gilbert D. W. F., Kuete, Victor, Mapitse, Renameditswe, Yeboah, Samuel O., Ngadjui, Bonaventure T.

“…Three new compounds, trilepisflavene (1), trilepisdepsidone (2), and daturadiol stearate (3), together with nine known compounds,…”
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Secondary metabolites with antiproliferative effects from Albizia glaberrima var glabrescens Oliv. (Mimosoideae) by Fotso, Ghislain Wabo, Kamga, Justin, Ngameni, Bathelemy, Uesugi, Shota, Ohno, Misa, Kimura, Ken-Ichi, Momma, Hiroyuki, Kwon, Eunsang, Furuno, Hiroshi, Shiono, Yoshihito, Ingrid, Simo K., Yeboah, Samuel O., Ngadjui, Bonaventure T.

“…A new 5-dehydroxyflavan, namely Albiziaflavan B or (+)-(2R, 3S, 4R)-3′,4′, 7-trihydroxy-4-methoxy-2,3-trans-flavan-3,4-trans-diol (1) was isolated from the…”
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Donellanic acids A–C: new cyclopropanic oleanane derivatives from Donella ubanguiensis (Sapotaceae) by Djoumessi, Aurelie V.B., Sandjo, Louis P., Liermann, Johannes C., Schollmeyer, Dieter, Kuete, Victor, Rincheval, Vincent, Berhanu, Abegaz M., Yeboah, Samuel O., Wafo, Pascal, Ngadjui, Bonaventure T., Opatz, Till

“…Three new cyclopropanic oleanane triterpenoids and ten known compounds were obtained from Donella ubanguiensis using chromatographic methods. The structures…”
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Thonningiiflavanonol A and thonningiiflavanonol B, two novel flavonoids, and other constituents of Ficus thonningii Blume (Moraceae) by Ango, Patrick Y., Kapche, Deccaux W.F.G., Fotso, Ghislain W., Fozing, Christian D., Yeboah, Elizabeth M.O., Mapitse, Renameditswe, Demirtas, Ibrahim, Ngadjui, Bonaventure T., Yeboah, Samuel O.

“…A phytochemical study of has led to the isolation of two previously unreported compounds, thonningiiflavanonol A and thonningiiflavanonol B together with 16…”
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Chemical Constituents of Croton oligandrum (Euphorbiaceae) by Abega, Destaing F., Kapche, Deccaux W. F. G., Ango, Patrick Y., Mapitse, Renameditswe, Yeboah, Samuel O., Ngadjui, Bonaventure T.

“…A new clerodane diterpene derivative named crotonoligaketone was obtained from the stem bark of Croton oligandrum along with eight known compounds including…”
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Elatumic Acid: A New Ursolic Acid Congener from Omphalocarpum elatum Miers (Sapotaceae) by Sandjo, Louis P., Fru, Chi G., Kuete, Victor, Nana, Frederic, Yeboah, Samuel O., Mapitse, Renameditswe, Abegaz, Berhanu M., Efferth, Thomas, Opatz, Till, Ngadjui, Bonaventure T.

“…A new triterpene diastereomer, 1, of the previously reported 3β,6β,19α-trihydroxy-urs-12-en- 28-oic acid-24-carboxylic acid methyl ester was obtained from the…”
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Two New Triterpenoidal Saponins from Roots of Pachystela msolo by Ache, Roland N, Tabopda, Turibio K, Yeboah, Samuel O, Ngadjui, Bonaventure T

“…Two new triterpenoidal saponins, pachystelanosides A (1) and B (2), and six known compounds have been isolated from the roots of Pachystela msolo. Their…”
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Profiling peanut (Arachis hypogea L.) accessions and cultivars for oleic acid and yield in Botswana by Kassa, Mulualem T, Yeboah, Samuel O, Bezabih, Merhatibeb

“…The ratio of monounsaturated oleic fatty acid to polyunsaturated linoleic fatty acid (O/L) and the associated agronomic traits were profiled for local peanut…”
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Excelsoside: A New Benzylic Diglycoside from the Leaves of Milicia excelsa by Ouete, Judith L. Nantchouang, Sandjo, Louis P., Kapche, Deccaux W. F. G., Yeboah, Samuel O., Mapitse, Renameditswe, Abegaz, Berhanu M., Opatz, Till, Ngadjui, Bonaventure T.

“…A new benzylic diglycoside was isolated from the leaves of Milicia excelsa and identified as 3,4-dimethoxybenzyl ß-D-xylopyranosyl(1 2)-ß-D-glucopyranoside…”
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Potential of Zanthoxylum leprieurii as a source of active compounds against drug resistant Mycobacterium tuberculosis by Bunalema, Lydia, Fotso, Ghislain Wabo, Waako, Paul, Tabuti, John, Yeboah, Samuel O

“…Tuberculosis (TB) is still a global health problem mainly due to development of resistance and co-infection with the Human immune Virus (HIV). Treatment of…”
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Omphalocarpoidone, a new lanostane-type furano-spiro-γ-lactone from the wood of Tridesmostemon omphalocarpoides Engl. (Sapotaceae) by Fru, Chi G., Sandjo, Louis P., Kuete, Victor, Liermann, Johannes C., Schollmeyer, Dieter, Yeboah, Samuel O., Mapitse, Renameditswe, Abegaz, Berhanu M., Ngadjui, Bonaventure T., Opatz, Till

“…•A new spiro-lanostane has been isolated from Tridesmostemon omphalocarpoides Engl.•Its structure was determined by 2D NMR spectroscopy and X-ray…”
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Rhuschalcones II-VI, five new bichalcones from the root bark of Rhus pyroides by Mdee, L.K, Yeboah, S.O, Abegaz, B.M

“…Biflavonoids detected in trace amounts in an earlier investigation of the twigs of Rhus pyroides have now been found in the root bark of this species. These…”
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Cytotoxicity of four Aframomum species (A. arundinaceum, A. alboviolaceum, A. kayserianum and A. polyanthum) towards multi-factorial drug resistant cancer cell lines by Kuete, Victor, Ango, Patrick Y, Yeboah, Samuel O, Mbaveng, Armelle T, Mapitse, Renameditswe, Kapche, Gilbert D W F, Ngadjui, Bonaventure T, Efferth, Thomas

“…The search for natural products as potential cytotoxic agents has yielded promising candidates. However multidrug resistance (MDR) is still a major hurdle for…”
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Rhuschalcones II−VI, Five New Bichalcones from the Root Bark of Rhus p yroides by Mdee, Ladislaus K, Yeboah, Samuel O, Abegaz, Berhanu M

“…Biflavonoids detected in trace amounts in an earlier investigation of the twigs of Rhus pyroides have now been found in the root bark of this species. These…”
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Recent results from natural product research at the University of Botswana by Majinda, Runner R. T., Abegaz, Berhanu M., Bezabih, Merhatibeb, Ngadjui, Bonaventure T., Wanjala, Cornelius C. W., Mdee, Ladislaus K., Bojase, Gomotsang, Silayo, Alfonse, Masesane, Ishmael, Yeboah, Samuel O.

“…Marketed plants are very important items of trade in many parts of the world. The community uses these for a variety of purposes such as foods, cosmetics,…”
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Physicochemical Properties of Mixtures of Morama Seed Oil With Alkanols and Alkyl Acetates at 298.15 K Atmospheric Pressure by Yeboah, Samuel O., Oathotse, Isaac, Ddamba, Wilfred A. A.

“…Densities, ρ, ultrasonic speed, u, and dynamic viscosities, η, of mixtures of morama, Tylosema esculentum, seed oil with 1‐propanol, 1‐butanol, methyl acetate,…”
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