Browsing by Author "Abegaz, B.M."

Now showing items 1-17 of 17

  • 3b-Taraxerol from Bridelia micrantha 

    Kouam, S.F.; Flo¨rke, U.; Krohn, K.; Akhtar, M.N.; Ngadjui, B.T.; Abegaz, B.M. (2009-02-13)
    Isolation of the title compound, C30H50O, from Bridelia micrantha yielded suitable crystals for an X-ray structure determination, showing it to be in the -form. The crystal packing is determined by infinite zigzag O—H ...

  • Antimicrobial activity of the extract from the twigs of Dorstenia Elliptica (Moraceae) 

    Kuete, V.; Ngameni, B.; Tsafack, A.M.; Ambassa, P.; Simo, I.K.; Bezabih, M.; Etoa, F.; Ngadjui, BT; Abegaz, B.M.; Beng, V.P. (Pharmacologyonline. http://www.pharmacologyonline.org/, 2007)
    The crude extract from the twigs of Dorstenia elliptica (DET) as well one of the five compounds isolated from this extract namely O-[3-(2, 2-dimethyl-3-oxo-2H-furan-5-yl)-3- hydroxybutyl]bergaptol (5) were tested for ...

  • Antimicrobial activity of the methanolic extracts and compounds from Treculia obovoidea (Moraceae) 

    Kuete, V.; Metuno, R.; Ngameni, B.; Tsafack, A.M.; Ngandeu, F.; Fotso, G.W.; Bezabih, M.; Etoa, F.; Ngadjui, B.T.; Abegaz, B.M.; Penlap, B.V. (Elsevier Ireland Ltd. www.elsevier.com/locate/jethpharm, 2007)
    The crude extract from Treculia obovoidea was subjected to purification by repeated chromatography. Eight compounds were isolated from Treculia obovoidea and identified as Psoralen (1), Bergapten (2), 7-methoxycoumarin ...

  • Antitrichomonal and antioxidant activities of Dorstenia barteri and Dorstenia convexa 

    Omisore, N.O.A.; Adewunmi, C.O.; Iwalewa, E.O.; Ngadjui, B.T.; Adenowo, T.K.; Abegaz, B.M.; Ojewole, J.A.; Watchueng, J. (Brazilian Journal of Medical and Biological Research. http://www.scielo.br/scielo.php?pid=0100-879X&script=sci_serial, 2005)
    Dorstenia barteri and D. convexa extracts and some isolated components of the former were investigated for effectiveness against Trichomonas gallinarum and compared with quercetin and quercitrin. The antioxidant activity ...

  • A bichalcone from the twigs of Rhus pyroides 

    Masesane, I.B.; Yeboah, S.O.; Liebscher, J.; Mugge, C.; Abegaz, B.M. (Elsevier Science Ltd, http://www.elsevier.com/locate/phytochem, 2000)
    The twigs of Rhus pyroides yielded a novel bichalcone 2',40,21-trihydroxy-4',41-dimethoxy-4-O-51-bichalcone. It was identified on the basis of spectroscopic data including 1D and 2D NMR spectroscopy. The name rhuschalcone-1 ...

  • Chalcones and other constituents of Dorstenia prorepens and Dorstenia zenkeri 

    Abegaz, B.M.; Ngadjui, B.T.; Dongo, E.; Ngameni, B.; Nindi, M.N.; Bezabih, M. (Elsevier Science Ltd. www.elsevier.com/locate/phytochem, 2002)
    The twigs of Dorstenia prorepens furnished the digeranylated chalcone, 5,30-(3,7-dimethyl-2,6-octadienyl)-3,4, 20,40-tetrahydroxychalcone while Dorstenia zenkeri yielded the 30,40-(3-hydroxy-2,2-dimethyldihydropyrano)-4 ...

  • Chemical constituents of Treculia acuminata and Treculia africana (Moraceae) 

    Metuno, R.; Ngandeu, F.; Tchinda, A.T.; Ngameni, B.; Kapche, G.D.W.F.; Djemgou, P.C.; Ngadjui, B.T.; Bezabih, M.; Abegaz, B.M. (Elsevier Ltd. www.elsevier.com/locate/biochemsyseco, 2007)
    Three species of the genus Treculia namely, Treculia acuminata Baill., Treculia africana Decne ex. Treà ´cul and Treculia obovoidea N.E.Br. grow in the humid rain forest of southwest Cameroon. They are also widely ...

  • Diterpenoids from the stem bark of Croton zambesicus 

    Ngadjui, B.T.; Abegaz, B.M.; Keumedjio, F.; Folefoc, G.N.; Kapchec, G.W.F. (Elsevier Science Ltd. www.elsevier.com/locate/phytochem, 2002)
    Three clerodane diterpenoids, crotozambefurans A, B and C were isolated from the stem bark of Croton zambesicus together with the known clerodane crotocorylifuran and two trachylobanes: 7b-acetoxytrachyloban-18-oic acid ...

  • Electrospray Liquid Chromatography–Mass Spectrometry of the Leaf Extract of Rhamnus prinoides 

    Nindi, M.M.; Kgarebe, B.V.; Wolfender, J.L.; Abegaz, B.M. (John Wiley & Sons, Ltd., 1999)
    Three naphthalenic derivatives, four flavonoids and two of the four anthraquinones previously isolated from the leaves of Rhamnus prinoides were successfully ionised under electrospray ionisation conditions. These compounds ...

  • Gaboroquinones A and B and 4'-O-demethylknipholone-4'-O-β-D-glucopyranoside, phenylanthraquinones from the roots of Bulbine frutescens 

    Abegaz, B.M.; Bezabih, M.; Msuta, T.; Brun, R.; Menche, D.; Muhlbacher, J.; Bringmann, G. (American Chemical Society. http://pubs.acs.org/jnp/, 2002)
    The novel phenylanthraquinones 4'-O-demethylknipholone-4'-O-β-D-glucopyranoside (2) and gaboroquinones A (3) and B (4) were isolated from the African medicinal plant Bulbine frutescens. Biaryl 2 represents the first ...

  • Isoflavonoids from Seeds of Millettia griffoniana (Bail), 15 

    Ngamga, D.; Yankep, E.; Tane, P.; Bezabih, M.; Ngadjui, B.T.; Fomum, Z.T.; Abegaz, B.M. (Verlag der Zeitschrift fu¨r Naturforschung, Tu¨bingen · http://znaturforsch.com, 2005)
    Three new isoflavonoids, griffonianone F, G and H were isolated from the seeds of Millettia griffoniana, along with the known prebarbigerone, pseudobaptigenin, pseudobaptigenin methyl ether, tephrosin, dipterixine, ...

  • Novel natural products from marketed plants of eastern and southern Africa 

    Abegaz, B.M.; Ngadjui, B.T.; Bezabih, M.; Mdee, L.K. (International Union of Pure and Applied Chemistry. http://www.iupac.org/publications/pac/, 1999)
    Marketed plants are an important but a vulnerable group of plants whose investigations as well as conservation should be considered with priority. The chemistry, and in some cases biological activities of novel iso¯avonoids, ...

  • Prenylated arylbenzofuran derivatives from Morus mesozygia with antioxidant activity 

    Kapche, G.D.W.F.; Fozing, C.D.; Donfack, J.H.; Fotso, G.W.; Amadou, D.; Tchana, A.N.; Bezabih, M.; Moundipa, P F; Ngadjui, B.N.; Abegaz, B.M. (Elsevier Ltd. www.elsevier.com/locate/phytochem, 2008)
    Five prenylated arylbenzofurans, moracins Q–U, were isolated from Morus mesozygia (Moraceae). Their structures were elucidated on the basis of spectroscopic evidence. Along with these compounds, 3b-acetoxyurs- 12-en-11-one, ...

  • Prenylated flavonoids and other constituents from the twigs of Dorstenia angusticornis (Moraceae)* 

    Simo, I.K.; Ngadjui, B.T.; Abegaz, B.M. (Elsevier Ltd. www.elsevier.com/locate/biochemsyseco, 2005-06-18)
    Dorstenia (Moraceae) is a mainly tropical genus of some 170 species (Mabberley, 1987). There are 23 species in Cameroon where a decoction of the leaves is administered for the treatment of cough, headache and stomach ...

  • Prenylated flavonoids, monoterpenoid furanocoumarins and other constituents from the twigs of Dorstenia elliptica (Moraceae) 

    Abegaz, B.M.; Ngadjui, B.T.; Folefoc, G.N.; Fotso, S.; Ambassa, P.; Bezabih, M.; Dongo, E.; Rise, F.; Petersen, D. (Elsevier Ltd. www.elsevier.com/locate/phytochem, 2003)
    A monoprenylated flavan and two monoterpenoid substituted furanocoumarins were isolated from the twigs of Dorstenia elliptica along with 3-(3,3-dimethylallyl)-4,20,40-trihydroxylchalcone, psoralen, bergapten, O-[3-(2,2- ...

  • Progress in the chemistry of marketed traditionally used plants of Ethiopia 

    Abegaz, B.M. (Chemical Society of Ethiopia. http://www.aau.edu.et/faculties/sc/CSE/home.html, 1996)

  • Recent results from natural product research at the University of Botswana 

    Majinda, R.R.T; Abegaz, B.M.; Bezabih, M.; Ngadjui, B.T; Wanjala, C.C.W.; Mdee, L.K.; Bojase, G.; Silayo, A.; Masesane, I.; Yeboah, S.O. (IUPAC. http://www.iupac.org/publications/pac/, 2001)
    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, flavors, spices, and medicines. It seems that plants that are ...