Figure 6-4 Infrared Spectra for artemisinin(top) and artemether, an artemisinin derivative(bottom) illustrate differences in their chemical composition. Artemisinin’s carbonyl(C=O) functional group, missing from the derivative molecule, produces a characteristic peak between 1700 and 1800 cm-1.
NOTE: cm-1= wave number;%T= percent transmittance.
SOURCE: Spectra from WHO, 2008.
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