@article{AbdissaInduliAkalaetal.2013,
  author    = {Abdissa, Negera and Induli, Martha and Akala, Hoseah M. and Heydenreich, Matthias and Midiwo, Jacob O. and Ndakala, Albert and Yenesew, Abiy},
  title     = {Knipholone cyclooxanthrone and an anthraquinone dimer with antiplasmodial activities from the roots of Kniphofia foliosa},
  series = {Phytochemistry letters},
  volume    = {6},
  journal   = {Phytochemistry letters},
  number    = {2},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1874-3900},
  doi       = {10.1016/j.phytol.2013.02.005},
  pages     = {241 -- 245},
  year      = {2013},
  abstract  = {A new phenylanthrone, named knipholone cyclooxanthrone and a dimeric anthraquinone, 10-methoxy-10,7'-(chrysophanol anthrone)-chrysophanol were isolated from the roots of Kniphofia foliosa together with the rare naphthalene glycoside, dianellin. The structures were determined by NMR and mass spectroscopic techniques. The compounds showed antiplasmodial activities against the chloroquine-resistant (W2) and chloroquine-sensitive (D6) strains of Plasmodium falciparum with 10-methoxy-10,7'-(chrysophanol anthrone)-chrysophanol being the most active with IC50 values of 1.17 +/- 0.12 and 4.07 +/- 1.54 mu g/ml, respectively.},
  language  = {en}
}
@article{KeruboMidiwoDereseetal.2013,
  author    = {Kerubo, Leonidah Omosa and Midiwo, Jacob Ogweno and Derese, Solomon and Langat, Moses K. and Akala, Hoseah M. and Waters, Norman C. and Peter, Martin and Heydenreich, Matthias},
  title     = {Antiplasmodial activity of compounds from the surface exudates of senecio roseiflorus},
  series = {Natural product communications : an international journal for communications and reviews},
  volume    = {8},
  journal   = {Natural product communications : an international journal for communications and reviews},
  number    = {2},
  publisher = {NPC},
  address   = {Westerville},
  issn      = {1934-578X},
  pages     = {175 -- 176},
  year      = {2013},
  abstract  = {From the surface exudates of Senecio roseiflorus fourteen known methylated flavonoids and one phenol were isolated and characterized. The structures of these compounds were determined on the basis of their spectroscopic analysis. The surface exudate and the flavonoids isolated showed moderate to good antiplasmodial activity with 5,4'-dihydroxy-7-dimethoxyflavanone having the highest activity against chloroquine-sensitive (D6) and resistant (W2) strains of Plasmodium falciparum, with IC50 values of 3.2 +/- 0.8 and 4.4 +/- 0.01 mu g/mL respectively.},
  language  = {en}
}