Natural products from the medicinal plant Duguetia staudtii (Annonaceae) - Ngouonpe, W A; Mbobda, WA S; Happi, M G; Mbiantcha, M; Tatuedom, K O; Ali, M S; Lateef, M; Tchouankeu, J C; Kouam, S F (Biochem Syst Ecol, 2019)