Material and methods
2.1. Plant material
Stem bark of Cassia siamea Lam. were collected from Mindouli
(Pool, Congo) in May 2007, based on information given by the
tradipractitioners. Plant material was identified by the botanists of
Centre d’Etudes sur les Ressources Végétales (CERVE), Brazzaville-
Congo. A voucher specimen has been deposited at the Herbarium of
the Laboratory of Botany of the CERVE under the number NN0701