Solís, P. N., Ravelo, A. G., Palenzuela, J. A., Gupta, M. P., Gonzalez, A., & Phillipson, J. D. (1997). Quinoline alkaloids from Psychotria glomerulata. Phytochemistry, 44(5), 963-969. https://doi.org/10.1016/S0031-9422(96)00583-3