1. Allen, J.F., andHolmstedt, B.F. 1980. The simple ?-carboline alkaloids.Phytochemistry 19:1573?1582.
2. Brattsten, L.B., Wilkinson, C.F., andEisner, T. 1977. Herbivore-plant interactions: Mixed function oxidases and secondary plant substances.Science 196:1349?1352.
3. Cavin, J.C., andRodriguez, E. 1982. Ethnopharmacognosy of Amazonian psychoactive plants, pp. 169?177,in J.V. Martinez and D.I. Marinez (eds.). Aspects of American Hispanic and Indian Involvement in Biomedical Research. Society for Advancement of Chicanos and Native Americans in Science, Bethesda, Maryland.
4. Cavin, J.C., Krassner, S.M., andRodriguez, E. 1987. Plant-derived alkaloids active againstTrypanosoma cruzi.J. Ethnopharmacol. 19:89?94.
5. Chang, C., Castellazzi, M., Glover, T.W., andTrosko, J.E. 1978. Effects of harman and norharman on spontaneous and ultraviolet light-induced mutagenesis in cultured Chinese hamster cells.Cancer Res. 38:4527?4533.