Antioxidant benzophenones and xanthones from the root bark of Garcinia smeathmannii

Autor: Alain Meli Lannang, Justin Komguem, Fernande Ngounou Ngninzeko, Jean Gustave Tangmouo, David Lontsi, Asma Ajaz, Muhammad Iqbal Choudhary, Beiban Luc Sondengam, Atta-ur-Rahman

Publikováno v: Bulletin of the Chemical Society of Ethiopia, Vol 20, Iss 2, Pp 247-252 (2006)

A new geranylated xanthone (1) was isolated from the root bark extract of Garcinia smeathmannii Oliver along with known guttiferone I, isoxanthochymol, smeathxanthones A and B, and triacontanyl caffeate. The structures of these compounds were elucida

Externí odkaz: https://doaj.org/article/7144ca75cc2847b281b89e2d0de08614

Antibacterial activity of some natural products against bacteria expressing a multidrug-resistant phenotype

Autor: A. E. Nkengfack, Victor Kuete, Jacqueline Chevalier, Jean Gustave Tangmouo, Gabriel N. Folefoc, Kenneth Oben Eyong, Sandrine Alibert-Franco, Bathelemy Ngameni, Justin Komguem, Jean Robert Nguemeving, Jean-Michel Bolla, Ghislain W. Fotso, Bonaventure T. Ngadjui, B. M. W. Ouahouo, Jean-Marie Pagès

Publikováno v: International Journal of Antimicrobial Agents
International Journal of Antimicrobial Agents, Elsevier, 2011, 37 (2), pp.156. ⟨10.1016/j.ijantimicag.2010.10.020⟩

International audience; The present study assessed the antimicrobial activities of various natural products belonging to the terpenoids, alkaloids and phenolics against a collection of Gram-negative multidrug-resistant (MDR) bacteria. The results dem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8cddea6bae5c7fc9c04a741c4cacc1d7
https://doi.org/10.1016/j.ijantimicag.2010.10.020

Antimalarial activity of extract and norbergenin derivatives from the stem bark of Diospyros sanza-minika A. Chevalier (Ebenaceae)

Autor: Kurt Hostettmann, Jean Gustave Tangmouo, An Matheeussen, Raimana Ho, Alain Meli Lannang, Louis Maes, Justin Komguem, Bernadette Biloa Messi

Publikováno v: Phytotherapy research

The methanol extract from the stem bark of Diospyros sanza-minika as well as five norbergenin derivatives isolated from this crude extract were evaluated for their in vitro activity against Plasmodium falciparum K1 and cytotoxicity on MRC-5 cells. 4-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff586f420120559e902ffc88ea0e28c8
https://doi.org/10.1002/ptr.3192

Norbergenin derivatives from the stem bark of Diospyros sanza-minika (Ebenaceae) and their radical scavenging activity

Autor: JG Tangmouo, Axel Tiwa Lontsi, Alain Meli Lannang, Justin Komguem, Kurt Hostettmann, D. Lontsi, Raimana Ho

Publikováno v: Phytochemistry Letters. 2:192-195

Three new norbergenin derivatives, 11-O-p-hydroxybenzoylnorbergenin, 4-O-(3′-methylgalloyl)norbergenin and 4-O-syringoylnorbergenin were isolated from the stem bark of Diospyros sanza-minika, along with three known compounds: norbergenin, 4-O-gallo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fed8fb25b2db21fd8d66aefb63c37a11
https://doi.org/10.1016/j.phytol.2009.07.001

ChemInform Abstract: Flavonol Glycoside from Psorospermum androsaemifolium

Autor: Dawe Amadou, Poumale Herve Martia Poumale, Alphonsine Nkapwa Guedem, Justin Komguem, Yoshihito Shiono, Rivoarison Randrianasolo, Hans Christoph Krebs, Bonaventure T. Ngadjui

Publikováno v: ChemInform. 42

A new flavonol glycoside (I) is isolated from the stem bark of the endemic Madagascan plant P.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b940f5cb8d1caf4880157891130d75ef
https://doi.org/10.1002/chin.201125207