Monoterpene bisindole alkaloids, from the African medicinal plant Tabernaemontana elegans, induce apoptosis in HCT116 human colon carcinoma cells - Mansoor, T A; Borralho, P M; Dewanjee, S; Mulhovo, S; Rodrigues, C MP; Ferreira, M U (J Ethnopharmaco, 2013)