J. Ayafor

Most-cited papers

1. New antioxidant and antimicrobial ellagic acid derivatives from Pteleopsis hylodendron.

   N. Atta-ur-Rahman, F. Ngounou, M. Choudhary, Shahid Malik +6 more

   2001Planta Medica71 citations

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2. Anti-plasmodial sesquiterpenoids from the African Reneilmia cincinnata.

   Maguerite H. K. Tchuendem, J. Mbah, Apollinaire Tsopmo, J. Ayafor +4 more

   1999Phytochemistry48 citations

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3. Vernoguinosterol and vernoguinoside, trypanocidal stigmastane derivatives from Vernonia guineensis (Asteraceae).

   A. Tchinda, A. Tsopmo, P. Tane, J. Ayafor +2 more

   2002Phytochemistry44 citations

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4. Urea derivatives from Pentadiplandra brazzeana.

   Apollinaire Tsopmo, D. Ngnokam, D. Ngamga, J. Ayafor +1 more

   1999Journal of Natural Products41 citations

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5. A Novel Natural Product Compound Enhances cAMP-Regulated Chloride Conductance of Cells Expressing CFTRΔF508

   Ana C. V. deCarvalho, Chi P. Ndi, A. Tsopmo, P. Tane +3 more

   2002Molecular Medicine38 citations Open access

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6. Trypanocidal diarylheptanoids from Aframomum letestuianum.

   P. Kamnaing, A. Tsopmo, E. Tanifum, M. Tchuendem +7 more

   2003Journal of Natural Products37 citations

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7. Quinolone and carbazole alkaloids from Clausena anisata

   B. Ngadjui, J. Ayafor, B. Sondengam, J. Connolly

   198937 citations

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8. Pachypophyllin and pachypostaudins A and B: three Bisnorlignans from Pachypodanthium staudtii

   B. Ngadjui, David Lontsi, J. Ayafor, B. Sondengam

   198936 citations

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9. Limonoids from Clausena anisata

   B. Ngadjui, J. Ayafor, B. Sondengam, J. Connolly

   198936 citations

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10. Coumarins from Clausena anisata

    B. Ngadjui, J. Ayafor, B. Sondengam, J. Connolly

    198935 citations

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11. Erythrinasinate, an ester from three Erythrina species

    Z. Fomum, J. Ayafor, J. Wandji, W. G. Fomban +1 more

    198634 citations

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12. Stigmastane derivatives and isovaleryl sucrose esters from Vernonia guineensis (Asteraceae).

    A. Tchinda, P. Tane, J. Ayafor, J. Connolly

    2003Phytochemistry33 citations

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13. Erythrisenegalone, a prenylated-flavanone from Erythrina senegalensis

    Z. Fomum, J. Ayafor, J. Wandji

    198530 citations

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14. Cyclodione, an unsymmetrical dimeric diterpene from Cylicodiscus gabunensis

    P. Tane, K. Bergquist, M. Téné, B. Ngadjui +2 more

    199529 citations

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15. Aframodial and other bioactive diterpenoids from Aframomum species

    J. Ayafor, M. Tchuendem, B. Nyasse, F. Tillequin +1 more

    199429 citations Open access

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16. Diarylheptanoids from Myrica arborea.

    M. Téné, Hyppolite Kamdem Wabo, P. Kamnaing, Apollinaire Tsopmo +3 more

    2000Phytochemistry28 citations

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17. Geranylated flavonoids from Dorstenia poinsettifolia

    A. Tsopmo, M. Tene, P. Kamnaing, D. Ngnokam +2 more

    199825 citations

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18. Hoslundin, hoslundal, and hoslunddiol: three new flavonoids from the twigs of hoslundia opposita (lamiaceae)

    B. Ngadjui, J. Ayafor, B. Sondengam, J. Connolly +1 more

    199124 citations

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19. Novel Onchocerca volvulus filaricides from Carapa procera, Polyalthia suaveolens and Pachypodanthium staudtii.

    V. Titanji, M. Evehe, J. Ayafor, S. Kimbu

    1990Acta Leidensia23 citations

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20. Prenylated coumarins from the leaves of Clausena anisata

    B. Ngadjui, J. Ayafor, B. Sondengam, J. Connolly

    198923 citations

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21. Diterpenoids from Neoboutonia glabrescens (Euphorbiaceae).

    A. Tchinda, A. Tsopmo, M. Téné, P. Kamnaing +5 more

    2003Phytochemistry22 citations

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22. Chromone glycosides from Schumanniophyton magnificum.

    P. Tane, J. Ayafor, B. Sondengam, J. Connolly

    1990Phytochemistry22 citations

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23. Erythrina studies. Part 2. Structures of three novel prenylated antibacterial flavanones, sigmoidins A–C, from Erythrina sigmoidea Hua

    Z. Fomum, J. Ayafor, J. Mbafor, Christie M. Mbi

    198622 citations

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24. Quinoline and indolopyridoquinazoline alkaloids from Vepris louisii

    J. Ayafor, B. Sondengam, B. Ngadjui

    198222 citations

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25. Efficient Isolation of a Large Amount of 20-Hydroxyecdysone from Vitex madiensis (Verbenaceae) by Droplet Counter-Current Chromatography

    I. Kubo, A. Matsumoto, J. Ayafor

    198421 citations Open access

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26. Nkolbisine, a New Furoquinoline Alkaloid, and 7-Deacetylazadirone From Teclea verdoorniana

    J. Ayafor, J. Okogun

    198221 citations

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27. Chemical studies on the Cecropiaceae: a novel A-ring seco triterpene from Musanga cecropioides

    D. Lontsi, B. Sondengam, J. Ayafor

    198920 citations

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28. Geranyl coumarins from Clausena anisata

    B. Ngadjui, S. M. Mouncherou, J. Ayafor, B. Sondengam +1 more

    199119 citations

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29. Nauclefolinine: a new alkaloid from the roots of nauclea latifolia

    D. Ngnokam, J. Ayafor, J. Connolly, J. Nuzillard

    200418 citations Open access

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30. Partially-acetylated dodecanyl tri- and tetra-rhamnoside derivatives from Cleistopholis glauca (Annonaceae)

    P. Tane, J. Ayafor, B. Sondengam, C. Lavaud +4 more

    198818 citations

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31. Khayalactone, a novel limonoid from Khaya grandifoliola

    M. Tchuendem, J. Ayafor, J. Connolly, O. Sterner

    199817 citations

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32. Senegalensein, A Novel Prenylated Flavanone from Erythrina senegalensis

    Z. Fomum, J. Ayafor, J. Wandji

    198717 citations

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33. Three labdane diterpenoids from Aframomum sceptrum (Zingiberaceae).

    Christabel Tomla, P. Kamnaing, Godfred A. Ayimele, E. Tanifum +4 more

    2002Phytochemistry16 citations

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34. Synthesis of Veprisine Dimers and the Formation of a Novel Cyclic Tetramer from Precocene I

    B. Ngadjui, J. Ayafor, A. E. Ngo Bilon, B. Sondengam +2 more

    199216 citations

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35. Sigmoidin D: a new prenylated flavanone from Erythrina sigmoidea.

    Rattanaporn Promsattha, M. Tempesta, Z. Fomum, J. Ayafor +1 more

    1986Journal of Natural Products15 citations

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36. Oppositin and 5-O-methylhoslundin, pyrone-substituted flavonoids of Hoslundia opposita

    B. Ngadjui, J. Ayafor, B. Sondengam, J. Connolly +2 more

    199314 citations

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37. 2R,3R-(+)-3-acetoxy-4′,5-dihydroxy-7-methoxyflavanone and 2R,3R-(+)-3-acetoxy-4′,5,7-trihydroxyflavanone: two new 3-acetylated dihydroflavonols from Aframomum pruinosum Gagnepain (Zingiberaceae)

    J. Ayafor, J. Connolly

    198114 citations

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38. Lophocarpin and 21β-Hydroxylophocarpin, Two New 30-Norfriedelane Triterpenes from Caloncoba Lophocarpa

    M. Tchuendem, J. Ayafor, J. Connolly

    199613 citations

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39. Hosloppin, a New Pyrone-Substituted Flavonoid from Hoslundia opposita

    B. Ngadjui, A. Tsopmo, J. Ayafor, J. Connolly +1 more

    199513 citations

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40. 3-acetoxy-5,7-dihydroxy-4'-methoxyflavanone, a new cytotoxic dihydroflavonol from Aframomum hanburyi K. Schum

    A. Tsopmo, M. Tchuendem, J. Ayafor, F. Tillequin +2 more

    199612 citations

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41. A New Peptide Alkaloid from Canthium anorldianum

    É. Dongo, J. Ayafor, B. Sondengam, J. Connolly

    198912 citations

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42. A norbislabdane and other labdanes from Aframomum sulcatum

    A. Tsopmo, Godfred A. Ayimele, P. Tane, J. Ayafor +2 more

    200211 citations

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43. Erythrina Studies; Part 3. Isolation of an isoflavone from Erythrina senegalensis and Erythrina excelsa.

    Z. Fomum, J. Ayafor, P. Ifeadike, A. Nkengfack +1 more

    1986Planta Medica11 citations

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44. Isolation and identification of three new phenolic furoquinoline alkaloids from Teclea verdoorniana Exell & Mendonça (Rutaceae)

    J. Ayafor, J. Okogun

    198211 citations

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45. Tetranortriterpenoids and related compounds. Part 26. Tecleanin, a possible precursor of limonin, and other new tetranortriterpenoids from Teclea grandifolia Engl. (Rutaceae)

    J. Ayafor, B. Sondengam, J. Connolly, D. Rycroft +1 more

    198110 citations

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46. The structure of veprisinium salt

    J. Ayafor, B. Sondengam, B. Ngadjui

    198110 citations

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47. 4,5-Epoxide-1,6-dimethyl-1-vinylhexyl p-coumarate: a novel monoterpene derivative from Cleistopholis patens.

    D. Ngnokam, A. Tsopmo, J. Ayafor, J. Nuzillard +1 more

    20048 citations Open access

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48. New friedelane triterpenes from Lepidobotrys staudtii

    P. Tane, A. Tsopmo, D. Ngnokam, J. Ayafor +1 more

    19968 citations

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49. Thomandertriol, a Triterpenoid from the Twigs of Thomandersia laurifolia

    B. Ngadjui, É. Dongo, J. Ayafor, J. Connolly

    19948 citations

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50. In vitro antifilarial activity of some medicinal plants.

    J. Comley, V. Titanji, J. Ayafor, V. K. Singh

    1990Acta Leidensia8 citations

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