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The reactions with hemoglobin of artemisinin and of its parent compounds, sodium artesunate and dihydroartemisinin, were investigated by visible absorption spectroscopy under standard solution conditions (50mM phosphate buffer, pH 7, 37°C). Notably, these antimalarial drugs were found to react with hemoglobin (i.e., ferrous heme), but not with methemoglobin (i.e., ferric heme). The reaction selectively...
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