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\bibitem{Houel_etal2009} Houel, E., Bertani, S., Bourdy, G., Deharo, E., Jullian, V., Valentin, A., et al. (2009). Quassinoid constituents of Quassia amara L. leaf herbal tea. Impact on its antimalarial activity and cytotoxicity. \textit{J. Ethnopharmacol.}, \textit{126}(1), 114--118.

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