== Author(s) ==
* N. Nyunaï, Institut de Recherches Médicales et d’Etudes des Plantes Médicinales, B.P. 3805, Yaoundé, Cameroon
* N. Njifutié, Faculty of Science, University of Yaoundé 1, P.O. Box 812, Yaoundé, Cameroon
== Correct citation of this article ==