A lanosteryl triterpene from Protorhus longifolia improves glucose tolerance and pancreatic beta cell ultrastructure in type 2 diabetic rats - Mabhida, S E; Mosa, R A; Penduka, D; Osunsanmi, F O; Dludla, P V; Djarova, T G; Opoku, A R (Molecules, 2017)