The bark of Strychnos tricalysioides from Cameroon has been studied. The main alkaloid (present in a minute amount) was identified to dolichantoside (TLC, UV, IR and CD) and compared to a reference compound previously isolated in our laboratory from Strychnos gossweileri root bark.
Quetin-Leclercq, J., & Angenot, L. (1984). Dolichantoside, main alkaloid from stem bark of strychnos tricalysioides. Planta Medica : natural products and medicinal plant research, 50(5), 457-458. https://doi.org/10.1055/s-2007-969770 (Original work published 1984)