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Chromatograms of the phyto-extracts of Artemisia annua and of the standard artemisinin. (A) Chemical structure of artemisinin; (B) details of the elution of STD artemisinin (pink) and (C) the ART in the AA phyto-extract samples; and (D) superimposed chromatograms of the ART standard and AA phyto-extracts at different concentrations of ethanol.
