Composition #1: Kuete, Victor., Tchakam, Patricia D., Wiench, Benjamin., Ngameni, Bathelemy., Wabo, Hippolyte K., Tala, Michel F., Moungang, Marlyse L., Ngadjui, Bonaventure T., Murayama, Tetsuya., Efferth, Thomas. Cytotoxicity and modes of action of four naturally occuring benzophenones: 2,2 ',5,6 '-Tetrahydroxybenzophenone, guttiferone E, isogarcinol and isoxanthochymol . phytomedicine, 2013, vol. 20, no. 6, p. 528–536. DOI: 10.1016/j.phymed.2013.02.003.
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