1. Department of Organic Chemistry, Faculty of Science, University of Yaounde 1, P.O. Box 812 Yaounde, Cameroon, Laboratory of Animal Physiology, Department of Animal Biology and Physiology, Faculty of Science, University of Yaounde 1, P.O. Box 812 Yaounde, Cameroon, Department of Internal Medicine, Faculty of Medicine and Biomedical Sciences, University of Yaounde 1, Cameroon, and Departament de Farmacologia, Facultat de Farmàcia, Universitat de València, Vicent Andrés Estellés s/n, 46100 Burjassot,...