Polycarpol, sitosterol and sitosterol-3-O-beta-D-glucoside isolated for the first time from Piptostigma preussi (Annonaceae) occur regularly in some Annonaceae such as Piptostigma genus. Polycarpol exhibits interesting antitrypanosomal activity with an ED(50) value of 5.11 muM on Trypanosoma brucei cells. Moreover, it inhibits T. brucei glycolytic enzymes GAPDH and PFK with IC(50) values of 650 and 180 muM respectively.
Ngantchou, I., Nkwengoua, E., Nganso, Y., Nyasse, B., Denier, C., Hannaert, V., & Schneider, B. (2009). Antitrypanosomal activity of polycarpol from Piptostigma preussi (Annonaceae). Fitoterapia, 80(3), 188-191. https://doi.org/10.1016/j.fitote.2009.01.008 (Original work published 2009)