Quinghaosu (artemisinin) was discovered by the Chinese scientist from Artemisia annua L. in 1972. Artemisinin is widely used anti-malarial drug. It can be synthesized easily and more economically from the extract of the plant. It acts by combining with red blood cell in which it consumes haemoglobin and liberates free heme and iron porphyrin ring and this iron reduce the peroxide bond of artemisinin and generates the free oxygen species which damages the parasite.
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