The isolation and structure determination of 9-methoxygeissoschizol from the stem bark of Strychnos guianensis is described. Elucidation of its structure is mainly based on NMR studies.
Mavar-Manga, H., Quetin-Leclercq, J., Llabres, G., Belem-Pinheiro, M.-L., Imbiriba da Rocha, A., & Angenot, L. (1996). 9-Methoxygeissoschizol, an alkaloid from bark of strychnos guianensis. Phytochemistry, 43(5), 1125-1127. https://doi.org/10.1016/S0031-9422(96)00454-2 (Original work published 1996)